Determine whether -9 is a zero of the polynomial. If it is, then find the other real zeros. P(x) = x³ + 8x² - 8x + 9 A) -9 is not a zero B) -9 is a zero and the other zeros are 8 and -8 C) -9 is a zero and the other is 9 D) -9 is a zero and there are no other real zeros.

Question

Quizplus · Accepted Answer

-9 is a zero because P(-9) = 0. To find the other zeros, factor P(x) as (x - 9)(x² + x - 1). The other zeros are the solutions to x² + x - 1 = 0, which are x = (-1 ± √5)/2.

Determine Whether -9 Is a Zero of the Polynomial