# Precalculus Examples

Set the function equal to and solve for .
Replace with .
To find the roots of the equation, replace with and solve.
Rewrite the equation as .
Since does not contain the variable to solve for, move it to the right side of the equation by adding to both sides.
Divide each term by and simplify.
Divide each term in by .
Reduce the expression by cancelling the common factors.
Cancel the common factor.
Divide by to get .
Reduce the expression by cancelling the common factors.
Factor out of .
Cancel the common factor.
Rewrite the expression.

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