Question

Find f(-3) if f(x)=x^2
A- -9
B- -6
C- 6
D-9

Answer 1

I agree with the above method, f(-3) which from the form of f(x), in which the x is where you plug into the rest of the equation which x^2. So (-3)^2 and will become positive, usually the parenthesis is indication it will be positive once squared.

Answer 2

D. 9

Explanation:

First, plug in -3 for the value of x in your function. You will get

f(-3)=(-3)^2

The square of any real number is always positive. Thus, (-3)^2=(-3)*(-3), or 9.