Algebra Examples

Solve Using the Quadratic Formula x^2-9=0
Step 1
Use the quadratic formula to find the solutions.
Step 2
Substitute the values , , and into the quadratic formula and solve for .
Step 3
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Step 3.1
Simplify the numerator.
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Step 3.1.1
Raising to any positive power yields .
Step 3.1.2
Multiply .
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Multiply by .
Multiply by .
Step 3.1.3
Add and .
Step 3.1.4
Rewrite as .
Step 3.1.5
Pull terms out from under the radical, assuming positive real numbers.
Step 3.2
Multiply by .
Step 3.3
Simplify .
Step 4
The final answer is the combination of both solutions.