Chapter 1, Problem 4CR

To determine

To Find: The value of $2x^2-14\text{ when }x=-3$

Answer to Problem 4CR

The value of $2x^2-14\text{ at }x=-3$ is $4$ .

Explanation of Solution

Given information:

The expression $2x^2-14\&x=-3$

Concept and Formula Used:

To find the value of expression at given value put the value of variable in the expression.

Calculation:

The given expression is $2x^2-14$

To find the value of $2x^2-14\text{ at }x=-3$ put the value of $x=-3$ in

  $\begin{array}{l}2x^2-14\\ {\left[2x^2-14\right]}_{x=-3}=2{\left(-3\right)}^2-14\\ {\left[2x^2-14\right]}_{x=-3}=2\times 9-14\\ {\left[2x^2-14\right]}_{x=-3}=18-14\\ {\left[2x^2-14\right]}_{x=-3}=4\end{array}$

Conclusion:

The value of $2x^2-14\text{ at }x=-3$ is $4$ .