Question

A function f(x) s defined as f(x)=-8x^2. What is f(-3)?

Answer 1

You substitute the x in the equation -8x^2 so it would be -8(-3)^2 so the answer would be -72

Answer 2

$f(-3)=-8\cdot(-3)^2\\ f(-3)=-8\cdot9\\ f(-3)=-72$