Question

What polynomial has roots of −5, −4, and 1?

x3 − 8x2 − 11x + 20
x3 − x2 + 22x + 40
x3 + x2 − 22x − 40
x3 + 8x2 + 11x − 20

Answer 1

Answer: The answer is D: x3 + 8x2 + 11x − 20

Explanation:

Answer 2

The last choice.

Explanation:

The last term is - 20 and because we have a coefficient of 1 on the x^3, and in order to get this last term and the given roots the factors have to be

(x + 5)(x + 4)(x - 1) so it is the last option.