11. Factor: x² + 4 = 0

A. (x+4) (x+1)
B. (x+4) (x-1)
C. (x+2) (x+2)

12. one factor of this equation x² + 17x - 60 = 0 is (x - 3), what is the other factor?

A. (x - 20)
B. (x + 12)
C. (x + 5)
D. (x + 20)

13. The solutions of quadratic equation x² + 2x - 15 = 0

A. x = 3 or x = 5
B. x = -5 or x = 3
C. x = 5 or x = -3
D. x = -3 or x = 5

14. What are the sum and the product of the roots of
2x² - 6x - 7 = 0

A. Sum = 3
Product = 7/2
B. Sum = 3
Product = 7/2
c. Sum = -3
Product = -7/2
d. Sum = 3
Product -7/2

15. In an equation -2x² - 5x + 1 = 0, what are the sum and product of the roots?

a. Sum = 5/2 Product = 1/2
b. Sum = -5/2 Product= -1/2
c. Sum= -5/2 Product = 1/2
d. Sum = 5/2 Product = -1/2

16. What is the sum of the roots of the quadratic equation 4x² + 8x - 3 = 0?

a. -2
b. 12
c. -15/8
d. -8/5

17. Which of the following equations represents a quadratic function?

a. 9y² + 3 = x
b. y = 2x² - 7x + 1
c. y = 3x - 82
d. y = 3x - 3

18. What is the value of y in the equation y = x²+ 2x + 7 if x= 2

a. 13
b. 14
c. 15​