13. Which of the following is NOT a root of x(x + 3)(x + 3)(x – 1)(2x + 1) = 0?

i. 0 ii. -3 iii. -1 iv. ½

A) i only B) ii only C) i and ii only D) iii and iv only

14. How many positive real roots does x4 – x3 – 11x2 + 9x + 8 = 0 have?

A) 0 B) 1 C) 2 D) 3

15. If P(-2) = 0, which of the following statements is true about P(x)?

A) x + 2 is a factor of P(x)

B) 2 is a root of P(x) = 0

C) P(x) = 0, has two negative roots

D) P(0) = -2​