11. Which of the following is NOT a perfect square number?
a.1 b. 2 c.4 d. 9

12. Which of the following gives a product of x2 + 5x + 4?
a.(x + 1)(x + 4) b. (x + 2)(x + 2)
c. (x + 5)(x-1) d. (x + 2)²

13. Which of the following is equal to x² + 4x + 3?
a.(x + 1)(x + 3) b. (x + 2)(x + 2) c. (x + 4)(x - 1) d. (x-4)(x-1)

14. One of the factors of x²-3x - 4 is x-4, what is the other factor?
a.x + 1 b. x - 1 c. X + 2 d.x-2

15. The area of a square is 4x² + 12x + 9 square units. Which expression represents the length of the side?
a.(3x + 2) units b. (2x + 3) units c. (4x + 9) units d. (4x + 3) units​