2
2
1. Factor ize 4 a b 2ab. 2
A.
(2 a + b)
B.
(2 + a + b) (2 a b)
C.
(2 + a b) (2 a b)
D.
(2 + a + b) (2 a + b) 2
2
2
2
2. Factor ize (x y ) + 4(x + 2xy + y ). A. (x y)(5x + 3y) B. (x + y)(5x 3y) C. (x y)(5x 3y) D. (x + y)(5x + 3y) 2
3. Factor ize 12 25t 20t. A. (5t 6)(2 5t) B. (5t + 6)(2 5t) C. (5t + 6)(5t + 2) D. (5t 6)(5t + 2) 2 2 2 4. Factor ize (5x y) 17x 13y .
A. 2(4x 3y)(x + 2y) B. 2(4x + 3y)(x 2y) C. 2(4x + 3y)(x + 2y) D. 2(4x 3y)(x 2y) 5. Factor ize 64d 3 27e 3 . A.
(4d 3e)(16d 2 12de 9e 2 )
B.
(4d 3e)(16d 2 12de 9e 2 )
C.
(4d 3e)(16d 2 12de 9e 2 )
D.
(4d 3e)(16d 2 12de 9e 2 )
P.1
1.
Factorize 36 60a 25a 2 .
2. Factor ize 9 x 2 30x 25 . 3. Factor ize 4 x 2 12x 9 . 4. Factor ize 49a 2 14a 1 4 x 2 4 x 1 . 5. Factor ize x 4 x 2 y 2 y 4 . 6. (a) Factor ize 25 10x x 2 . (b) Hence, factor ize 25 10(n 1) (n 1) 2 . 7. Factor ize 15x 2 27x 54 . 8. Factor ize 4ax 2 3ax 52a . 9. Factor ize 7 xy 5 7 x 4 y 2 . 10. (a) Factor ize x 3 8 . (b) Hence, factor ize x 3 6 x 4 .
P.2
1.
2
2
2
4 a b 2ab
B
2
2
2 (a + 2ab + b )
2 2 (a + b) 2 [2 + (a + b)][2 (a + b)] (2 + a + b)(2 a b) ( x 2 y 2 ) 4( x 2 2 xy y 2 ) ( x y )( x y ) 4( x y ) 2 ( x y )[(x y ) 4( x y )]
2. D
( x y )(5 x 3 y )
12 25t 2 20t (25t 2 20t 12) (5t 6)(5t 2)
3. B
(5t 6)(2 5t )
4. B
2
2
2
2
2
2
8x 10xy 12y 2
2
2
2(4x 5xy 6y ) 2(4x + 3y)(x 2y) 64d 3 27e 3 (4d ) 3 (3e) 3
5. C
2
(5x y) 17x 13y 25x 10xy + y 17x 13y
(4d 3e)[(4d ) 2 (4d )(3e) (3e) 2 ] (4d 3e)(16d 2 12de 9e 2 )
P.3
2
1.
36 60a 25a 2 (5a 6) 2
2.
9 x 2 30x 25 (3x 5) 2
3.
4 x 2 12x 9 (2 x 3) 2
4. 49a 2 14a 1 4 x 2 4 x 1 (49a 2 14a 1) (4 x 2 4 x 1) (7a 1) 2 (2 x 1) 2 (7a 1 2 x 1)[(7a 1) (2 x 1)] (7a 2 x 2)(7a 2 x)
5. x 4 x 2 y 2 y 4 x 4 2 x 2 y 2 y 4 x 2 y 2
( x 2 y 2 ) 2 ( xy) 2 ( x 2 y 2 xy)( x 2 y 2 xy) 6. (a)
25 10x x 2 ( x 5) 2
(b) 25 10(n 1) (n 1) 2 [(n 1) 5] 2 [By the r esult of (a)]
(n 4) 2 7. 15x 2 27x 54 3(5 x 2 9 x 18) 3(5x 6)(x 3) 8. 4ax 2 3ax 52a a(4 x 2 3x 52) a(4 x 13)(x 4) 9. 7 xy 5 7 x 4 y 2 7 xy 2 ( y 3 x 3 ) 7 xy 2 ( x y)(x 2 xy y 2 ) 10. (a) (b)
x 3 8 x 3 2 3 ( x 2)(x 2 2 x 4)
x 3 6 x 4 x 3 8 6 x 12 ( x 3 8) 6( x 2) ( x 2)(x 2 2 x 4) 6( x 2) [By the r esult of (a)] ( x 2)[(x 2 2 x 4) 6]
( x 2)(x 2 2 x 2)
P.4