10. What is the complete factored form of the expression y4 - 49?
A. (₂2)² – (72)2
B. (y2 - 7)2
C. (y2 + 7)
D. (y2 - 7) (y2 + 7)

11. Which of the following polynomials has factors (xy - 1)(xy + 1)?
A. xy - 1
B. x2y2 - 1
C. xy2 - 1
D. x2y2 + 1

12. Which of the following expressions is a perfect cube?
A. 8x
B. 27x2
C. 64x6
D. 125x4

13. Which of the following is the complete factored form of the cubic polynomial x2 - 8?
A. (x-2)(x2 + 2x + 4)
B. (x + 2)(x2 - 2x + 4)
C. (x-2)(x2 + 2x - 4)
D. (x-2)(x2 - 2x + 4)

14.Factor completely: 27x3 + 64y3.
A. (3x)3 + (4y) 3
B. (3x + 4y) (9x2 - 12xy + 1672)
C. (3x + 4y) (3x2 – 3xy + 16y?)
D. (3x + 4y)(3x2 - 12xy + 4y2)

15. Your classmate was asked to square (2x - 3), he answered 4x2 - 9. Is his answer correct?
A. Yes, because product rule is correctly applied.
B. Yes, because squaring a binomial always produces a binomial product.
C. No, because the answer must be 4x2 +9.
D. No, because squaring a binomial always produces a trinomial product.​