Pre-Algebra Examples

Solve for y y^3=9y
Step 1
Subtract from both sides of the equation.
Step 2
Factor the left side of the equation.
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Step 2.1
Factor out of .
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Step 2.1.1
Factor out of .
Step 2.1.2
Factor out of .
Step 2.1.3
Factor out of .
Step 2.2
Rewrite as .
Step 2.3
Factor.
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Step 2.3.1
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 2.3.2
Remove unnecessary parentheses.
Step 3
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Step 4
Set equal to .
Step 5
Set equal to and solve for .
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Step 5.1
Set equal to .
Step 5.2
Subtract from both sides of the equation.
Step 6
Set equal to and solve for .
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Step 6.1
Set equal to .
Step 6.2
Add to both sides of the equation.
Step 7
The final solution is all the values that make true.