Question

Evaluate f(x)=-2x²+4x-2 find f(-2)

Answer 1

It is -18

Explanation:

`f(x) = - 2 {x}^(2) + 4x - 2`

when x is -2, f(x) is f(-2):

`f( - 2) = - 2 {( - 2)}^(2) + 4( - 2) - 2 \\ \\ f( - 2) = - 8 - 8 - 2 \\ \\ f( - 2) = - 18`

Answer 2

-2

Explanation:

If f(x) = 2x² + 4x - 2

f(-2) = 2(-2)² + 4(-2) - 2

f(-2) = 2(4) + 4(-2) - 2

f(-2) = 8 - 8 - 2

f(-2) = -2