Exercise- A
A) Without actuall division . Find the remainder, if
1) f(x)= 5x² - 7x +4 is divided by g(x) = x -2. 10
2) f(x)= 7x² - 3x + 8 is divided by g(x)= x - 4. 108
3) f(x)= 2x³-3x²+ 7x - 8 is divided by g(x)= x - 1. -2
4) f(x)= 2x³ - 7x² +3 is divided by g(x)= x -2. -9
5) x³- 2x+1 is divided by x - 3. 22
6) x⁴ - 2x³ +1 is divided by x - 2. 1
7) 2x³ - x² + 1 is divided by x - 2. 13
8) x³ - 5x² + 10x -7 is divided by x - 3.
9) x³ - 4x² + 8x -5 is divided by x - 1
10) a³ - 14a -8 is divided by a - 4
11) 6y³ - 18y +12 is divided by y - 1.
12)
8) f(x)= x³ - 3ax² + a²x +3a² is divided by f(x)=x - a. -2a³+ 3a²
9) If f(x)= x⁴ - 6x³ + 2x - 3, find f(3) using Remainder Theorem.
Exercise - B
1) f(x)= 4x³ - 6x² + 7x - 2 is divided by g(x)= x - 1/2. 1/2
2) f(x)= 5x³ - 3x² + x/5 - 3/25 is divided by g(x)= 5x - 3. -2/25
3) 5x² - 4x - 1 is divided by 2x - 1. -7/4
4) x³ - 2x² + 3x +1 is divided by 2x - 1. 17/8
5) x⁴ - 2x³ +1 is divided by 2x - 1. 13/16
Exercise - C
1) f(x)= x³ - 2x² + x - 3 is divided by g(x)= x +2. -21
2) f(x)= 7x³ + 5x² - 5x - 2 is divided by g(x)= x +1. 1
3) f(x) = 2x³+7x² - x +1 is divided by g(x)= x+1. 7
4) f(x) =2x² - 6x +4 is divided by g(x)= x + 3. 32
5) x² - 3x +1 is divided by x+1. 5
6) x⁴ - 2x³ +1 is divided by x + 2. 33
7) 2x³ + 7x² -12 is divided by x + 3. -3
8) x³ - 4x² + x +6 is divided by x +1.
9) x⁴+ x³ -6 is divided by x +2.
10) b³ - b² + 3b -4 is divided by b+1.
Exercise -D
1) f(x)= 2x³ - 3x² -4x - 5 is divided by g(x)= 2x +1. -4
2) f(x)= 3x² +5x - 9 is divided by g(x)= 3x+2. -11
3) f(x)= 3x⁴+2x³ - x²/3+ 2x/9 + 1 is divided by g(x) x + 2/3. 19/27
4) x⁴ - 2x³ +1 is divided by 3x + 2. 145/81
5) 3x³+5x² - 11x - 4 is divided by 3x +1. 1/9
6) 4x³ - 4x² + 3x - 5 is divided by 2x + 3. -32
7)
Exercise-E
1) When kx³ + 9x² + 4x - 100 is divided by (x+1), the Remainder is 2. Find the value of k. -97
2)Find the value of a if the division of x³+ 5x² - ax + 6 by (x - 1) leaves the Remainder 2a. 4
3) When x³ +3x² - Kx +4 is divided by (x - 2), the Remainder is k. Find the value of the constant k. 8
4) Find the value of a if the division of ax³+ 9x²+ 4x - 10 by (x+3) leaves a reminder 5. 2
5) When kx³+9x²+4x - 10 is divided by x+1, the remainder is 2. Find the value of k. -7
6) The expression x⁵- 10x²- kx - 1
When divided by x - 2 leaves the Remainder k. Find the Remainder when the expression is divided (x+2). -3, 2k-73
7)
Exercise -F
1) Check f(x)= x²-5x+6. is the factor of x -2. Yes
2) Check f(x)= x²-5x+6. is the factor of x -3 Yes
3) Check f(x)= 2x²-5x-12. is the factor of x -4. Yes
4) Check f(x)= 6x²-5x-6. is the factor of 2x -3 Yes
5) Check f(x)= 3x²-2x-8. is the factor of 3x +4. Yes
5) Check f(x)= 9x²- 4a²+ 4ay - y². is the factor of 3x ++2a - y. Yes
6) Check f(x)= x³- 3x²+4x-2. is the factor of x -1 Yes
7) Check f(x)= x²(x -14)+ 37x- 60. is the factor of x -2. No
8) Check whether x+ 2 is a factor of x³ + 3x² + 7x + 8. No
9) Check whether x+ 2 is a factor of x³ + 4x² + 7x + 8. Yes
10) check that (x +1) is a factor of x³ + 2x² - 5x - 6. Yes
11) Check that (x +3) is a factor of x³ + 2x² - 5x - 6. Yes
12) Check p(x)= x³ - 3x² + 4x - 4, is a factor of g(x)= x - 2. Yes
13) Check p(x)= 2x³ + 4x +6, is a factor of (x)= x + 1. Yes
14) Check p(x)= x³ + x² + 3x +175, is a factor of g(x)= x + 5. No
15) Show that x - 5 is a factor of x³-17x - x² - 15. Yes
16) Prove x +1 is a factor of 3x³ +5x² -6x - 8.
17) Use factor throrem to test which of the expression
A) (x - 1),
B) (x - 2),
C) (2x+1)
D) (2x - 1) are factor of 2x³ + x² - 2x - 1.
18) Prove x - 3 is a factor of x³ - 7x²+15x - 9.
19) check that 2x +11 is a factor of 6x³ + 3x² - 2x -1. No
20) Prove by Remainder Theorem that x⁴+ x³ + 2x - 4 is Divisible by x² + x - 2.
21) Show that x⁴ - 5x³ + 5x² + 5x -6 is an integral multiple of x²-5x+6.
Exercise - G
1) If x - 2 is a factor of the following polynomial find the value of a in each case:
A) p(x)= x² - 3a + 5a. 2/5
B) p(x)= x³ - 2ax² - ax - 1. 7/6
2) Find a if x-2 is factor of x²- ax+6. 5
3) Find k when x³- 3x²- x + k if x+1 is factor. 3
4) If x +3 is a factor of x³ - 49x + m, find m. - 120
5) If x - 3 is a factor of x³ + kx + 9, find k. - 6
6) Find the value of m if x³ - 6x² + mx - 6 is divisible by x - 3. 11
7) Find the value of a, if x - a is a factor of x³ - ax² + x +2. -2
8) If 2x+1 is a factor of 6x³ +5x² +ax - 2, find the value of a. -3
9) If 3x - 2 is a factor of 3x³- k x²+21x - 20, find the value of k. -23/2
10) Find the value of m if x - m is a factor of x² + m x - 18. ±3
11) If x - 2 is a factor of x⁴ -kx³ -x² + 3x - 2, find k. 2
12) Find the value of m if x - m is a factor of 3x³ + 2x² - 19x + 3.
13) Use Remainder Theorem to determine the value of k for which x+2 is a factor of (x+1)⁷+(2x+k)³. 4
14) If 3x -2 is a factor of 3x³-kx²+21x-10, find the value of k. 11
15) If 2x +1 is a factor of 6x³ +5x²+a x -2, find the value of a. -1/2
16) Find the values of a if g(x)= x+a is a factor of f(x)= x³+ a(x²+ 1) - 2x + 4. -4/3
Exercise - H
1) What should be substracted from x³ - 3x² - 10x + 24 so that x -2 may be a factor? 2
2) Find the number which is to be added to 3x³ - 8x +1 so that it is divisible by (x + 3). 56
3) Find the number which is to be substracted from x⁴ - 3x² + 2x - 1 so that it is divisible by x - 2. 7
4)
Exercise I
1) Find the value of p and q if x+3 and x-4 are the factor of x³- px²- qx +24. 3,10
2) If 2x - 1, 2x - 3 are the factors of 8x³ + ax² + 46x + b , find a and b. -36, -15
3) If x - 1 and x+3 are factors of x³ - ax² - 13x + b, find a and b.
4) The expression 2x³- px² -11x+q is exactly Divisible by x+2 and
2x - 1. Find p and q. 3, 6
5) Find the value of the consonants a and b, if x - 2 and x + 3 are both factors of the expression x³+ ax² + bx - 12.
6)
Exercise - J
1) Find the values of p and q if g(x)= x+2 is a factor of f(x)= x³- px + x + q and f(2)= 4. 4,2
2) Find the values of p and q if g(x)= x-4 is a factor of f(x)= 4x³- px² + qx -216 and f(-1)= -225. 3,2
3) Find the values of a and b if g(x)= x+2 is a factor of f(x)= ax³- bx² + 2(x-2) and f(2)= 20. 3/4, -7/2
4)
EXERCISE-K
Factorise Completely (Using Remainder Theorem):
1) x³ - 19x - 30
2) x³ - 2x² - 5x + 6
3) x³ - 3x² - 4x + 12.
4) x³+x²-4x-4.
5) x³+5x²+ 2x - 8.
6) x³-7x²+ 14x -8. (x-1)(x-4)(x-2)
7) y³ - 23y - 12.
8) x³+3x² - 13x - 15
9) x³ +6x² + 11x +6.
10) x³ +2x² -x -2.
11) x³ - 7x² + 4x -12.
12) 2x³ +3x² -x -4.
13)
) Prove that 2x - 5 is a factor of 4x² - 4x - 15. Hence, factorise 4x² - 15 Completely.
) show that x - 3 is a factor of x³-7x²+15x - 9. Hence, factorise Completely.
) Prove that (x - 5) is a factor of 2x² - x - 45. Hence factorise 2x² - x - 45 Completely.
EXERCISE - L
1) If 2x -3 is a factor of 2x³- 9x² + x+ p. Find the value of p. Hence find all the factors. 12, (x+1)(x-4)(2x -3)
2) If 3x -2 is a factor of 3x³+ x² + px+ 12. Find the value of p. Hence find all the factors. -20, (x+3)(x-2)(3x -2)
3) If x +3 is a factor of x³- 3x² -px+ 24. Find the value of p. Hence find all the factors. 10, (x+3)(x- 2)(x -4)
4) If x +4 is a factor of 2x³+ px² -7x -12. Find the value of p. Hence find all the factors. 7, (x+4)(x+1)(2x -3)
5) If x -2 is a factor of x³+ 2x² -13x+ p. Find the value of p. Hence find all the factors. 10, (x+5)(x-2)(x -2)
6) If x² -4 is a factor of px³ + qx² -8 x -12. Find the value of p and q. Hence find all the factors. 2, 3, (x+2)(x-2)(2x -3)
7) If x²+ 4x +3 is a factor of px³+ 6x² + qx+ 6. Find the value of p and q. Hence find all the factors. 1, 11, (x+1)(x+2)(x +3)
8) Given that (x+2) and (x - 3) are factors of x³ + ax + b, Calculate the values of a and b, and the remaining factor.
9) Find the value of a and b if q(x)= x - 1 is a factor of
p(x)= x³ - ax² - 5x + b and p(-1)=8.
10) If x² - 3x + 4 is a factor of x³ + x² - lx + m, find l and m. -16, 16
11) if (x+2) and (x - 3) are factors of x³ + ax + b, find the values of a and b, with these values of a and b, factorise the given expression.
12) Find the value of p and q if
px⁴ + 3x³ - 7x² - 12x + q is divisible by 2x² + 3x + 1
13) If (x+2) and (x - 3) are factors of x³+a x +b, find the values of a and b. With these values of a and b, factorise the given expression.
14) If x²+x - 2 Divides 2x³+px²+qx -14 completely, find p and q.
15) If f(x)= 24x³ + px² - 5x + q has two factors 2x +1 and 3x -1, then find p and q. Also factorise f(x) Completely.
16) Find the value of the constant a and b if x-2 and x+3 are factors of the expression x³ + ax² + bx -12.
) ax⁴+ x³+ bx² - 4x + c are x+1,
x -2, 2x -1. Find the values of a, b, c and the fourth factor.
) Find the value of k for which three expression 2x² - x - 1,
x²+2x -3 and 3x² - 5x + k have a common linear factor.
EXERCISE - M
1) A polynomial leaves the Remainder 9 and 64 when respectively divided by x +2, x - 3. Find the remainder When it is divided by (x+2)(x - 3).
2) If the quotient when 3x³ - 2x² + 7x - 5 is divided by x + 3 is given as 3x² - 11x + a. Find a. 40
3)
) .
EXERCISE - N
1) Find the quotient when x³ + x² - 7x - 3 is divided by (x -1)(x + 3). x -1
2) If the quotient on dividing x³ - 3x² + 4x + 5 by x - 3 is x² - a, find a. -4
4)
EXERCISE - O
1) If x² + px +q and x² + qx + p have a common linear factor, prove that p+q+1= 0, (p ≠ q).
2) If x + a be the factor of x²+px+q and x² + lx + m, show that a = (q - m)/(p - l)
EXERCISE - P
1) Find the linear expression which is divisible by x - 5 and which leaves the Remainder -11 when divided by 2x +1
2) Find the quadratic expression which has a factor x - 3 and Which leaves the Remainder 20 and 35 respectively when divided by x +1 and x+ 2
3) Find the cubic expression which is divisible by x - 2 and
2x - 1 and Which leaves the Remainder - 18 and 10 when Divided by x+1 and x - 3
4) Find a cubic which is Divisible by (x -1) and (x -2) and Which leaves the Remainder - 24 and - 60 when divided by x+2, x+2
EXERCISE - Q
1) If ax³ + 3x² + bx - 3 has a factor (2x+3) and leaves Remainder - 3 when divided by (x+2), find the values of a, b. With these values of a and b, factorise Completely.
2) x² - 1 is a factor of x³ + ax²-x+b. When the expression is divided by x - 2, the Remainder is 15. Find the values of a and b.
3) If x+2 is a factor of the expression x³+ax² + bx +2 and if the Remainder when the expression is divided by x - 2 is - 4 find a and b.
4) If ax³+3x+bx-3 has a factor of 2x+3 and leaves remainder - 3 when divided by x+2, find the values of a and b. With these values of a and b, factorise the given expression.
Mg. A- R.1
1) Without actually dividing, find the remainder when 2x³ + 3x² -2x +3 is divided by x +2.
a) 5 b) -5 c) 6 d) -6 e) 2
2) Find the remainder when 3x³ - 9x +4 is divided by x - 1.
a) 2 b) -2 c) 1 d) -1 e) none
3) Without actually dividing show that 5x³ +2x² -13x +6 is divided by x +2.
4) When 2x³ - ax² + 3x -10 is divided by x - 2, the remainder is -8. Find a.
a) 2 b) 3 c) 4 d) 5 e) 6
5) When 2x³ - 9x² + 10x +a is divided by x +1 the remainder is -4. Find a.
a) 15 b) 16 c) 17 d) 18 e) 19
Mg. A- R.2
1) If both ax³+2x²- 3 and x²-ax +4 leave the same remainder when divided by x - 2, find a.
2) For what value of k, the expression x² + x + k and x² - x+k have a common factor ?
3) Without actually dividing, find the remainder when 3x³ +7x² -8x -5 is divided by x +3.
a) 1 b) 2 c) 3 d) 4 e) -2
4) Without actually dividing show that 3x³ + 5x² -6x -8 is divided by x +1.
5) 4x³ - 3x² + 7x + k is divided by x +2 leaves - 40 as remainder. Find k.
a) 17 b) 18 c) 19 d) 20 e) 21
6) Expression x² + ax + b is divided by x +1 and x+2 leaves the same remainder 12. Find a and b.
a) 6,7 b) 7,6 c) -6,-7, d) -7-6 e) 6,-7
7) Without performing the actual division process, find the remainder when 3x³ + 5x² - 11x - 4 is divided by 3x+1. 1/9
Mg. A- R.3
1) Find the values of the constants a and b, if (x-2) and (x+3) are both factors of the expression x³ + ax² + bx - 12.
a) 3,4 b) -3,4 c) 3, -4 d) -3,-4
2) use the factor theorem to factorise completely x³ + x² - 4x - 4. (x+1)(x+2)(x-2)
3) using the remainder theorem find the remainder when 7x² - 3x +8 is divided by x-4.
a) 110 b) 107 c) 108 d) 105 e) 100
4) Without performing the actual division process, find the remainder when 3x³ + 5x² - 11x - 4 is divided by 3x+1.
a) 1 b) 1/2 c) 2/3 d) 3/4 e) 1/9
5) find the value of a, if (x-a) is a factor of x³ - ax² + x+2.
a)-1 b) -2 c)-3 d) 1 e) 2
6) Show that (x-3) is a factor of x³ -7x²+15x-9= 0. Hence, Factorize x³ -7x² + 15x -9. (x-3)²(x-1)
7) Find the remainder when 2x³ - 3x² +7x - 8 is divided by x-1.
a) -1 b) -2 c) 3 d) 4
Mg. A- R.4
1) Find the remainder (without division) on dividing f(x) by (x-2) where f(x)= 5x² - 7x +4.
a) 9 b) 8 c) 7 d) 10 e) 12
2) Find the remainder (without division) on dividing f(x) by (x-2) where f(x)= 2x³ - 7x²+3.
a) 9 b) -9 c) 8 d) -8 e) 7
3) find the remainder (without devision) on dividing 3x² +5x - 9 by (3x+2).
a) -9 b) 9 c) 10 d) 11 e) -11
4) without actual division, find the remainder when p(x)= 3x² - 5x +7 is divided by (x-2).
a) 9 b) 10 c) 11 d) 12 e) 13
5) find out without actual division, the remainder when 4x³ - 6x² + 7x - 2 is divided by x - 1/2.
a) 1/2 b) 1/3 c) 1/4 d) 2/3 e) 4/3
6) find the remainder when 3x⁴ + 2x³ - x²/3 + 2x/9+ 1 is divided by x + 2/3.
a) 1/7 b) 2/7 c) 3/7 d) 19/27 e) 17/19
7) Find the remainder when 5x³ - 3x² + x/5 - 3/25 is divided by 5x -3.
a) 0 b) 1 c) 2 d) 3 e) 4
8) Find the remainder when x³ - 3ax² + a²x + 3a³ is divided by x - a.
a) 2a³ b) 2a² c) 2a d) a e) 2
Mg. A- R.5
1) When kx³ + 9x² + 4x - 10 is divided by (x+1), the remainder is 2. Find the value of k .
a) -7 b) 7 c) -6 d) 6 e) 5
2) using remainder theorem, find the value of a if the division of x³+ 5x² - ax + 6 by (x-1) leaves the reminder 2a.
a) a b) 2 c) 3 d) 4 5) -1
3) if (2x+1) is a factor of 6x³+5x² + ax -2, find the value of a.
a) -3 b) -2 c) -4 d) 5 e) none
4) if (3x-2) is a factor of 3x³-kx² + 21x - 10, find the value of k.
a) 11 b)10 c) 9 d) 8 e) 7
5) if both ax³ + 2x² - 3 and x² - ax +4 leave the same remainder when divided by (x-2), find a.
a) 3/10 b) 3 c) 10 d) 10/3 e) none
6) if (x-1) and (x+3) are factors of x³ - ax² - 13x + b, find a,b.
a) 3,15 b) 2,10 c) 4,12 d) 3,-12 e) 5, 10
7) If x² +x -2 divides 2x³ + px² + qx - 14 Completely, find p,q.
a) 9,3 b) -9,3 c) 9,-3 d) -9,-3 e) none
Mg. A- R.6
1) If (x+2) and (x-3) are factors of x³ + ax +b, find the values of a and b. with this Value of a and b, factorise the given expression. -7, -6, (x+2)(x-3)(x+1)
2) If ax³ + 3x² + bx -3 has a factor (2x+3) and leaves remainder -3 when divided by (x+2), find the values of a and b. with these values of a and b, factorise the given expression. 2, -2, (2x+3)(x-1)(x+1)
3) prove that x-5 is a factor of 2x² - x - 45. Hence factorise 2x² - x - 45 completely. (x-5)(2x+9)
4) prove that 2x-5 is a factor of 4x² - 4x - 15. Hence, factorise 4x²- 4x - 15 completely. (2x-5)(2x+3)
5) Obtain a factor of x³ - 3x² - 4x +12 by factor theorem. Hence, factorise it completely. (x-2), (x-2)(x+2)(x-3)
6) obtain the factor of y³ -13y -12 by factor theorem. Hence factorise completely. y+1, (y+1)(y-4)(y+3)
7) if f(x)= 24x³ + px² - 5x +q has two factors 2x+1 and 3x-1, then find p and q. Also factorise f(x) completely. -2,1, (2x+1)(3x-1)(4x-1)
Mg. A- R.7
1) Calculate, without actual division, the remainder when 5x³+8x²- 2x-9 is divided by x+2.
a) 6 b) 7 c) 8 d) 9 e) none
2) If f(x)= 24x³+ px²- 5x+ q has 8 factors 2x+1 and 3x-1, then find p and q. Also Factorise f(x) completely.
3) remainder if 2x³-3x²+7x-8 is divided by x-1
A) 2 B) -2 C) 3 D) -3
4) Find the number should be added with the number 2x²+3x+1 to make x-1 is the factor .
A) 6 B)-6 C) none D) none of these
5) If f(x)= 24x³ + px² - 5x +q has two factors 2x+1 and 3x-1, then find p and q.Also Factorise completely.
6) Factorise completely : x³ + x² - 4x -4.
7) find remainder when 3x³+ 5x²- 11x -4 is divided by 3x+1. (2)
e) When kx³+ 9x²+ 4x -10 is divided by (x+1), the remainder is 2. Find k.
8) Factorise completely: x³ - 3x² - 4x +12. (5)
Mg. A- R.8
1) prove that x-5 is a factor of 2x² - x - 45. Hence factorise 2x² - x - 45 completely. (x-5)(2x+9)
2) prove that 2x-5 is a factor of 4x² - 4x - 15. Hence, factorise 4x²- 4x - 15 completely. (2x-5)(2x+3)
3) Obtain a factor of x³ - 3x² - 4x +12 by factor theorem. Hence, factorise it completely. (x-2), (x-2)(x+2)(x-3)
4) Calculate, without actual division, the remainder when 5x³+8x²- 2x-9 is divided by x+2.
5) If f(x)= 24x³+ px²- 5x+ q has 8 factors 2x+1 and 3x-1, then find p and q. Also Factorise f(x) completely.
6) remainder if 2x³-3x²+7x-8 is divided by x-1
A) 2 B) -2 C) 3 D) -3
7) Find the number should be added with the number 2x²+3x+1 to make x-1 is the factor .
A) 6 B)-6 C) none D) none of these