Finite Math Examples

Find the Roots (Zeros) f(x)=x^3-4x
Step 1
Set equal to .
Step 2
Solve for .
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Step 2.1
Factor the left side of the equation.
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Step 2.1.1
Factor out of .
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Step 2.1.1.1
Factor out of .
Step 2.1.1.2
Factor out of .
Step 2.1.1.3
Factor out of .
Step 2.1.2
Rewrite as .
Step 2.1.3
Factor.
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Step 2.1.3.1
Since both terms are perfect squares, factor using the difference of squares formula, where and .
Step 2.1.3.2
Remove unnecessary parentheses.
Step 2.2
If any individual factor on the left side of the equation is equal to , the entire expression will be equal to .
Step 2.3
Set equal to .
Step 2.4
Set equal to and solve for .
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Step 2.4.1
Set equal to .
Step 2.4.2
Subtract from both sides of the equation.
Step 2.5
Set equal to and solve for .
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Step 2.5.1
Set equal to .
Step 2.5.2
Add to both sides of the equation.
Step 2.6
The final solution is all the values that make true.
Step 3