Question

F (x)=x^2+4 what is f(-4)

Answer 1

f(-4) = 20

Step-by-step explanation

To find f(-4) we just have to replace x by -4 in function f(x):

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

First solve the exponents. Remember that if the exponent is even and the result is always positive, either the base is positive or negative:

`f(-4)=16+4=20`