Question

What is the vertex of the graph of the function f(x) = x² + 8x - 2?

(-4,18)
(0,-2)
(-8, -2)
(-4,-18)

Answer 1

(4, -18)

Explanation:

First Use this formula for the x -axis -b/2a

-8/2(1) is -4

Then plug in -4 to the equation

(-4)^2+8(-4)-2 = -18