Precalculus Examples

Solve Using the Quadratic Formula
Use the quadratic formula to find the solutions.
Substitute the values , , and into the quadratic formula and solve for .
Simplify.
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Simplify the numerator.
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Raise to the power of to get .
Multiply by to get .
Multiply by to get .
Subtract from to get .
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Simplify the denominator.
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Rewrite.
Multiply by to get .
Simplify .
Divide by to get .
The final answer is the combination of both solutions.
Double roots
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