Question

If f(x) = 3x^2 + 4x-5, then f(-2) =

Answer 1

-1

Explanation:

`f(x) = 3x {}^(2) + 4x - 5 \\ f( - 2) = 3( - 2) {}^(2) + 4( - 2) - 5 \\ = 12 - 8 - 5 \\ = - 1`

Answer 2

f(x) = 3x² + 4x - 5

So, f(-2)

= 3(-2)² + 4(-2) - 5

= 3(4) + (-8) - 5

= 12 - 8 - 5

= 4 - 5

= -1