A) Multiple Choices 4. Factorize 10ap + 15aq 10bp 15bq.
1. Factorize 6 x 18x 2 . A. (a b)(10p + 15q)
A. 6 x(1 3 x) B. (a + b)(10p + 15q)
C. 5(a + b)(2p + 3q)
B. 6 x (1 3 x 2 )
D. 5(a b)(2p + 3q)
2
C. 6(3 x)
D. 6(3 x 2 1) 2 2
5. Factorize 3x + 6xy + 3y .
2 2
A. 3(x + y )
2. Factorize 14x 2 y 2 8 yz . B. 3(x y)
2
2
A. 2 y 2 (7 x 2 8 z ) C. (x y)
2
B. 2 y (7 xy 8 z ) D. 3(x + y)
C. 2 y (7 xy 2 4 y )
2
6. Factorize 25s + 20s 4.
D. 2 y (7 x 2 y 4 z ) 2
A. (5s + 2)
2
B. (5s + 2)
2
3. Factorize 2bc 10ab + cd 5ad. C. (5s 2)
2
A. (b + 2d) (c 5a) D. (5s 2)
B. (b + 2d) (5a c)
2 2
C. (2b + d) (c 5a) 7. Factorize 36a b + 6a b.
A. (6a + b 1)(6a + b)
D. (2b + d) (5a c)
B. (6a + b + 1)(6a + b)
C. (6a + b 1)(6a b)
D. (6a + b + 1)(6a b)
2 2 2
8. Factorize 4 a b 2ab. 12. Factorize x 6x 27.
2
A. (2 a + b) A. (x 9)(x 3)
B. (2 + a + b) (2 a b) B. (x 9)(x + 3)
C. (2 + a b) (2 a b)
C. (x + 9)(x + 3)
D. (2 + a + b) (2 a + b)
D. (x + 9)(x 3)
4
9. Factorize 625 x .
2
A. (25 x )
2 2
13. Factorize x + 2x 35.
2
B. (5 x) (25 + x )
2 A. (x + 5)(x + 7)
2 B. (x 5)(x 7)
C. (5 + x)(5 x)(25 + x )
2 2 C. (x 5)(x + 7)
D. (25 x )(25 + x )
D. (x + 5)(x 7)
2 2 2 2
10. Factorize (x y ) + 4(x + 2xy + y ).
2
A. (x y)(5x + 3y) 14. Factorize x + 5x + 36.
B. (x + y)(5x 3y) A. (x + 4)(9 x)
C. (x y)(5x 3y) B. (x + 4)(x + 9)
D. (x + y)(5x + 3y) C. (x + 4)(x 9)
D. (x 4)(x + 9)
4 2 2 4 2
11. Factorize 9x 6x y + y z + 4z 4.
2
2 2 2
A. (3x y + z 2)(3x y z 2)
2 2 2
15. Factorize 5x + 3 2x .
2 2
B. (3x y + z 2)(3x y z + 2)
2 2 A. (x + 3)(1 2x)
2
C. (3x y z 2)
2 2 B. (x + 3)(2x 1)
2 2 2 2 C. (x + 3)(2x + 1)
D. (3x y z + 2)(3x y z 2)
D. (x 3)(2x + 1)
2 2
16. Factorize 12 25t 20t. 20. Factorize 39m 82mn + 8n 2 .
A. (5t 6)(2 5t) A. (39m + 2n)(m + 4n)
B. (5t + 6)(2 5t) B. (39m + 4n)(m + 2n)
C. (5t + 6)(5t + 2) C. (39m 4n)(m 2n)
D. (5t 6)(5t + 2) D. (39m 2n)(m 4n)
2 2 2 2 2
17. Factorize (5x y) 17x 13y . 21. Factorize 10x 22xy + 4y .
A. 2(4x 3y)(x + 2y) A. 2(5x y)(x + 2y)
B. 2(4x + 3y)(x 2y) B. 2(5x y)(x 2y)
C. 2(4x + 3y)(x + 2y) C. 2(5x + y)(x + 2y)
D. 2(4x 3y)(x 2y) D. 2(5x + y)(x 2y)
2 2 2
18. Factorize 12m 12n(5m + 36n). 22. Factorize 96q 12pq 45p .
A. 12(m 4n)(m 9n) A. 3(4q 15p)(8q + p)
B. 12(m 9n)(m + 4n) B. 3(4q 3p)(8q + 5p)
C. 12(9n m)(m 4n) C. 3(4q + 15p)(8q p)
D. 12(m 4n)(m + 9n) D. 3(4q + 5p)(8q 3p)
19. Factorize (5x 2)(6x 1)x 5x + 2. 23. Factorize 8b3 c 3 .
A. (5x 2)(2x + 1)(3x 1)
A. (2b c)3
B. (5x 2)(2x + 1)(3x + 1)
B. (2b c)(2b c) 2
C. (5x 2)(2x 1)(3x 1)
D. (5x 2)(2x 1)(3x + 1) C. ( 2b c)(4b 2 2bc c 2 )
D. ( 2b c)(4b 2 2bc c 2 )
24. Factorize 643 1 . 27. Factorize a 3 (a 2b)3 .
A. ( 4 1) 3 A. 2b(3a 2 12ab 4b 2 )
B. ( 4 1)(162 4 1) B. 2b(3a 2 12ab 4b 2 )
C. ( 4 1)(162 4 1) C. 2b(3a 2 6ab 4b 2 )
D. ( 4 1)(162 4 1) D. 2b(3a 2 6ab 4b 2 )
25. Factorize 64d 3 27e 3 . 28. Factorize (8 x 3)3 ( x 3)3 .
A. ( 4d 3e)(16d 2 12de 9e 2 ) A. 27 x(19x 2 21x 9)
B. ( 4d 3e)(16d 2 12de 9e 2 ) B. 27 x(19x 2 21x 9)
C. ( 4d 3e)(16d 2 12de 9e 2 ) C. 27x (19x 2 21x 9)
D. ( 4d 3e)(16d 2 12de 9e 2 ) D. 27 x(19x 2 21x 9)
26. Factorize y 5 27y 2 . 29. Factorize 8 xy 4 2( x y ) 2 2( x y ) 2 .
A. y 2 ( y 3)3 A. 8 xy( y 1)( y 2 2 y 1)
B. ( y 3)( y 2 3 y 9) B. 8 xy( y 1)( y 2 2 y 1)
C. y 2 ( y 3)( y 2 3 y 9) C. 8 xy( y 1)( y 2 y 1)
D. y 2 ( y 3)( y 2 3 y 9) D. 8 xy( y 1)( y 2 y 1)
30. Factorize 4 p 6 q 4q . 8. Factorize 49 16a 2 b 2 .
A. 4q( p 1) 2 ( p 4 p 2 1)
B. 4q( p 1) 2 ( p 4 p 2 1) 9. Factorize mx ny nx my .
C. 4q ( p 1)( p 1)( p 4 p 2 1)
D. 4q ( p 1)( p 1)( p 4 p 2 1)
10. Factorize 6 s 4 y 3sr 2 yr .
B) Short Questions
1. Factorize 15xy 5y. 11. Factorize 18x 2 2 y 2 6 x 2 y .
2. Factorize x 2 144 .
12. Factorize x 2 3 x 2 .
3. Factorize 3 x 2 y 15x . 13. Factorize x 2 5 x 6 .
14. Factorize x 2 18x 65 .
4. Factorize x 2 16y 2 .
15. Factorize x 2 4 x 4 .
5. Factorize 3 x 2 27 . 16. Factorize 4 x 2 14x 18 .
17. Factorize 2 x 2 8 x 6 .
6. Factorize 2m 2 32 .
18. Factorize 2 x 2 13x 21 .
7. Factorize 5 x 2 125 .
19. Factorize 2 x 2 3x 54 . 28. Factorize x 2 2 xy y 2 4 z 2 .
20. Factorize 12 5 x 2 x 2 . 29. Factorize ( x 2 16x 64) ( y 2) 2 .
21. Factorize 1 y 3 . 30. Factorize x 4 y 4 .
22. Factorize 27 x 3 64 . 31. Factorize 49a 2 14a 1 4 x 2 4 x 1 .
23. Factorize 64x 3 8 y 3 . 32. Factorize x 2 5 xy 6 y 2 .
24. Factorize 125x 3 27 y 3 . 33. Factorize x 4 y 10x 3 y 2 25x 2 y 3 .
25. Factorize 36 60a 25a 2 . 34. Factorize x 4 x 2 y 2 y 4 .
26. Factorize 9 x 2 30x 25 . 35. (a) Factorize 25 10x x 2 .
(b) Hence, factorize 25 10( n 1) ( n 1) 2 .
27. Factorize 4 x 2 12x 9 .
36. (a) Factorize x 2 4 x 3 .
(b) Hence, factorize ( 2 x 3) 2 4( 2 x 3) 3 .
37. Factorize 5 2 x 3 x 2 . 46. (a) Factorize x 3 8 .
(b) Hence, factorize x 3 6 x 4 .
38. Factorize 12x 4 x 2 9 .
47. Factorize ( x 1) 3 x 3 .
39. Factorize 15x 2 27 x 54 .
48. Factorize (8 x 3 y 3 ) (2 x y ) .
40. Factorize 4ax 2 3ax 52a .
49. (a) Factorize 25x 2 10x 1 .
(b) Hence, factorize 25( x 2 y 2 ) 10x 1 .
2 2
41. Factorize 2 x 5 xy 2 y .
50. (a) Factorize 81x 2 90xy 25 y 2 .
42. Factorize 12x 2 32xy 16 y 2 . (b) Hence, factorize 81( m n) 2 90( m n)( p q) 25( p q ) 2 .
43. Factorize axy 4 ax 4 y .
44. Factorize 7 xy 5 7 x 4 y 2 .
45. Factorize ( x y ) 3 ( x y ) 3 .
7. D
2 2
Solution of Summer Exercise – Factorization 36a b + 6a b (6a) 2 b 2 + 6a b
1. A (6a + b)(6a b) + (6a b)
6 x 18x 2 6 x(1 3 x ) (6a + b + 1)(6a b)
8. B
2 2 2 2 2
2. D 4 a b 2ab 2 (a + 2ab + b )
14x 2 y 2 8 yz 2 y (7 x 2 y 4 z ) 22 (a + b) 2
[2 + (a + b)][2 (a + b)]
(2 + a + b)(2 a b)
3. C
2bc 10ab cd 5ad 2b(c 5a ) d (c 5a ) 9. C
(2b d )(c 5a) 625 x 4 252 ( x 2 ) 2
(25 x 2 )(25 x 2 )
4. D (5 x)(5 x )(25 x 2 )
10ap + 15aq 10bp 15bq 5(2ap + 3aq 2bp 3bq)
5[a(2p + 3q) b(2p + 3q)]
5(a b)(2p + 3q) 10. D
( x 2 y 2 ) 4( x 2 2 xy y 2 ) ( x y )( x y ) 4( x y ) 2
5. D ( x y )[( x y ) 4( x y )]
2 2 2 2
3x + 6xy + 3y 3(x + 2xy + y ) ( x y )(5 x 3 y )
3(x + y) 2
6. C
2
25s + 20s 4 (25s 2 20s + 4)
[(5s) 2 2(5s)(2) + 2 2 ]
2
(5s 2)