Chapter 9 - Solving Quadratic Equations - 9.3 - Solving Quadratic Equations Using Square Roots - Monitoring Progress - Page 499: 1

$x=5$ and $x=-5$

The given equation is $\Rightarrow -3x^2=-75$ Divide each side by $-3$. $\Rightarrow \frac{-3x^2}{-3}=\frac{-75}{-3}$ Simplify. $\Rightarrow x^2=25$ Take square root of each side. $\Rightarrow x=\pm5$ Hence, the solutions are $x=5$ and $x=-5$.