## Precalculus (6th Edition) Blitzer

The value of $\left( f-g \right)\left( 0 \right)$ is $-3$.
To find the value of $\left( f-g \right)\left( 0 \right)$, find the value of $f\left( 0 \right)$ and the value of $g\left( 0 \right)$. It is seen from the graph that $f\left( 0 \right)=-2$ and $g\left( 0 \right)=1$. Now find the value of $\left( f-g \right)\left( 0 \right)$, \begin{align} & \left( f-g \right)\left( 0 \right)=f\left( 0 \right)-g\left( 0 \right) \\ & =-2-1 \\ & =-3 \end{align} Thus, the value of $\left( f-g \right)\left( 0 \right)$ is $-3$.