16. Which of the following is a sum of two cubes?
A. m3 + 9 C. m3 + 9
B. m3 – 27 D. m3 + 8
17. What is the greatest common factor in the expression 28x3y
6z
5 + 16x3y
8z
9?

A. 8x3y
4z
3 C. 4x3y
6z
5

B. 4x2y
4z
2 D. 8x3y
8z
9

18. Factor x2 + 11x +30.
A. (x + 6) (x + 5) C. (x + 15) (x + 2)
B. (x + 30) (x + 1) D. (x – 15) (x + 2)
19. Factor x2 – 15x + 36.
A. (x – 36) (x – 1) C. (x – 12) (x – 3)
B. (x – 18) (x – 2) D. (x – 6) (x – 6)
20. Factor x2 – 10x – 24.
A. (x – 6) (x + 4) C. (x – 8) (x + 3)
B. (x – 12) (x + 2) D. (x – 24) (x + 1)
21. Factor 27x3 – 64.
A. (3x – 4) (9x2 – 12x + 16) C. (3x – 4) (9x2 + 24x + 16)
B. (3x – 4) (9x2 + 12x + 16) D. (3x + 4) (9x2

- 24x + 16)

22. Factor x2 – 16x + 15.
A. (x + 5) (x – 3) C. (x + 15) (x + 1)
B. (x - 5) (x – 3) D. (x - 15) (x – 1)
23. Find the missing term so that 16x4 + _____ + 25 forms a perfect square trinomial.
A. 20x C. 40x
B. 20x2 D. 40x2
24. Factor 4m2 + 7mn – 2n2
.

A. (2mn – n) (2m + 2n) C. (4m – n) (m + 2n)
B. (4m + n) (m – 2n) D. (4m – 2n) (m + n)
25. Factor -5x3 + 5x.
A. 5x (x2 – 1) C. -5x (x + 1) (x – 1)
B. -5x (x2 + 1) D. 5x (-x
2 + 1)

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