Question

Which of the following is a zero for the function f(x) = (x + 3)(x – 7)(x + 5)?

x = –7

x = –3

x = 3

x = 5

Answer 1

I already know how to do it, but Ive done about ten of these and im tired

Answer 2

set f(x) = 0 , f(x) is a product of 3 of them, if each one is zero, then the product will be zero :)