Chapter 1.4, Problem 2MCQ

To determine

To find: $f\left(4\right)$

Answer to Problem 2MCQ

  $-9$

Explanation of Solution

Given information: $f\left(x\right)=7-x^2$

Calculation:

Substitute $x=4$ in $f\left(x\right)$ and simplify as shown below.

  $\begin{array}{c}f\left(x\right)=7-x^2\\ f\left(4\right)=7-{\left(4\right)}^2\\ =7-16\\ =-9\end{array}$

Thus, the value of $f\left(4\right)$ is $-9$ .