Question

What is f(-2) if f(x)=x^2+3

Answer 1

f(-2)=7

Explanation:

substitute -2 in for x

`f( - 2) = { - 2}^(2) + 3`

-2×-2=4

4+3=7

Answer 2

f(-2)=7

Explanation:

`f(x)=x^2+3\\\\f(-2)=?`

Substitute ; -2 for x in the given function

`f(-2)= (-2)^2+3\\\\\mathrm{Calculate\:exponents}\:\left(-2\right)^2\::\quad 4\\\\f(-2)=4+3\\\\f(-2)=7`