Chapter 7 - Polynomial Equations and Factoring - 7.4 - Solving Polynomial Equations in Factored Form - Exercises - Page 381: 24

The x-coordinates are $x=-22$ and $x=15$.

The graph crosses the x-axis when $y=0$. $\implies y=-0.2(x+22)(x-15)=0$ Using zero-product property, we have $x+22=0$ or $x-15=0$. Solving for $x$, we obtain $x=-22$ or $x=15$. The x-coordinates are $x=-22$ and $x=15$.