Which of the following is an x-intercept of the function f (x) = x^2-64

x - intercepts are - 8 and 8

Step-by-step explanation:

to find the x-intercepts set f (x) = 0, that is

x² - 64 = 0 (this is a difference of squares)

(x - 8) (x + 8) = 0 ← in factored form

equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x + 8 = 0 ⇒ x = - 8

8 and - 8