Question

Which of the following is a zero from the function f(x)=(x+3)(x-7)(x+5)? X=-7, X=-3, X=3, X=5

Answer 1

x = - 3

Explanation:

To find the zeros set f(x) = 0, that is

(x + 3)(x - 7)(x + 5) = 0

Equate each factor to zero and solve for x

x + 3 = 0 ⇒ x = - 3

x - 7 = 0 ⇒ x = 7

x + 5 = 0 ⇒ x = - 5