Chapter 9.8, Problem 31STP

To determine

To calculate: To find the x-intercepts of the graph $y=x^2-4$

Answer to Problem 31STP

x-intercepts are $2,-2$

Explanation of Solution

Given information: Function is $y=x^2-4$

Calculation:

Function is given as

  $y=x^2-4$

To find the x-intercept, substitute $y=0$ in above equation

  $\begin{array}{l}{x}^2-4=0\\ x^2=4\\ x=\pm 2\end{array}$

Conclusion:

Hence, x-intercepts are $2,-2$