Q38. - Algebra 1

Question

Examples 4 and 5 If $f\left(x\right)=-2x-3$ and $g\left(x\right)=x^2+5x,$ find each value. (P. 50)

$f\left(0\right)-7$

Step-by-Step Solution

Answer

The value of the function $f\left(0\right)-7$ is $-10$.

Step 1. Interpreting of function.

$f\left(0\right)$ Indicates the value of function $f\left(x\right)$ at $x=0$

Step 2. Apply substitution method.

Substitute $x=0$ into the function $f\left(x\right)$

$\begin{array}{l}f\left(0\right)=-2\left(0\right)-3\\ f\left(0\right)=-3\end{array}$

Step 3. Further calculation.

$\begin{array}{l}f\left(0\right)-7=-3-7\\ f\left(0\right)-7=-10\end{array}$

Therefore, the value of the function $f\left(0\right)-7$ is $-10$.