How do you find f(−3) given f(x)=2x+2?

2 Answers
Perihelion
Mar 12, 2018

f(−3)=−4

Explanation:

Simply substitute the value of −3 given. In other words, f(−3) is the function of f(x), however in this case, x is −3

f(−3)=2(−3)+2

Distribute 2 through the parenthesis

f(−3)=−6+2

Simplify

f(−3)=−4

The Legend
Mar 12, 2018

−4

Explanation:

We can substitute −3 for x and simplify:
f(x)=2x+2
f(−3)=2(−3)+2
f(−3)=−6+2
f(−3)=−4
So f(−3)=−4.

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