# Precalculus Examples

To find the roots of the equation, replace with and solve.

Rewrite the equation as .

Factor out of .

Factor out of .

Factor out of .

Factor out of .

Rewrite as .

Factor.

Since both terms are perfect squares, factor using the difference of squares formula, where and .

Remove unnecessary parentheses.

Set equal to and solve for .

Set the factor equal to .

Subtract from both sides of the equation.

Set the factor equal to .

Add to both sides of the equation.

The solution is the result of and .