Question

F(x)= -4x² + 5x
find f(6).

Answer 1

The answer is -114.

Explanation:

You have to substitute x = 6 into the function :

`f(x) = - 4 {x}^(2) +5 x`

`f( 6) = - 4 {(6)}^(2) + 5(6)`

`f(6) = - 4(36) + 30`

`f(6) = - 144 + 30`

`f(6) = - 114`