Answer:
x- intercepts are - 8 and 8
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