Question

If f(x) = 2x squared -30 find f(4)

Answer 1

F(x) = 2x^2 - 30
F(4) = 2(4^2) - 30
F(4) = 2(16) - 30
F(4) = 32 - 30
F(4) = 2

Answer 2

`2`

Explanation:

To solve this, you would just substitute 4 in for the x.

`f(x) = 2x^2-30\\f(4) = 2(4)^2-30 = 2*16-30 = 32-30 =2`