Autumn Hebert

2023-02-28

How to find $f\left(-3\right)$ given $f\left(x\right)=2x+2$?

repicotit48p

Given solution: Simply substitute the value of $-3$ given. In other words, $f\left(-3\right)$ is the function of $f\left(x\right)$, however in this case, $x$ is $-3$
$f\left(-3\right)=2\left(-3\right)+2$
Distribute $2$ through the parenthesis
$f\left(-3\right)=-6+2$
Simplify
$f\left(-3\right)=-4$

Dillan Perez

We could replace $-3$ for $x$ and simplify:
$f\left(x\right)=2x+2$
$f\left(-3\right)=2\left(-3\right)+2$
$f\left(-3\right)=-6+2$
$f\left(-3\right)=-4$
So $f\left(-3\right)=-4$.

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