Chapter 1.7, Problem 4CGP

To determine

The value of the expression $f\left(-2\right)$ if $f\left(x\right)=2x-3$ .

Answer to Problem 4CGP

The value of the expression $f\left(-2\right)$ if $f\left(x\right)=2x-3$ is $-7$ .

Explanation of Solution

Given:

The expression is $f\left(x\right)=2x-3$ .

Calculation:

Substitute $-2$ for $x$ in the expression $f\left(x\right)=2x-3$ to calculate the value of $f\left(-2\right)$ as follows:

  $\begin{array}{c}f\left(-2\right)=2\left(-2\right)-3\\ =-4-3\\ =-7\end{array}$

Thus, the value of the expression $f\left(-2\right)$ if $f\left(x\right)=2x-3$ is $-7$ .