# Factoring Worksheets - Page 3

Factoring Worksheets
• Page 3
21.
Factor:
- 5$x$3 + 4$x$2 + 20$x$ - 16
 a. - (5$x$ + 4)($x$ - 2)2 b. - (5$x$ + 4)($x$ + 2)($x$ - 2) c. - (5$x$ - 4)($x$ - 2)2 d. - (5$x$ - 4)($x$ + 2)($x$ - 2)

22.
Factor 4$x$3 + 8$x$2 + 16$x$ completely.
 a. $x$($x$2 + 2$x$ + 4) b. 4$x$($x$2 + 2$x$ + 4) c. 4$x$($x$2 - 4$x$ + 2) d. 4$x$($x$2 - 2$x$ + 4)

23.
Factor.
- 3$a$2 - 27$a$ - 36
 a. - 3($a$2 - 9$a$ - 12) b. - 3($a$2 + 9$a$ + 12) c. - 9($a$2 - 9$a$ - 12) d. - 3($a$2 + 9$a$ - 12)

24.
Express as a perfect square.

 a. b. c. d.

If the area of a square board is (25$z$2 + 40$z$ + 16) cm2, then find the length of its side.
 a. (6$z$ + 4) cm b. (5$z$ + 5) cm c. (5$z$ + 4) cm d. (5$z$ - 4) cm