Question

Using F(x) = 5x^2- 3, what is f(-3)?

A. 42
B. -3
C.-48
D. -42

Answer 1

Answer: 42

Explanation

Switch x out with 3

using Pemdas do the exponent first

3^2 is 9

then multiply

5*9= 45

then subtract

45-3=42