Factor
4\left(m-1\right)\left(m+1\right)
Evaluate
4\left(m^{2}-1\right)
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4m^{2}-4
Multiply and combine like terms.
4\left(m^{2}-1\right)
Factor out 4.
\left(m-1\right)\left(m+1\right)
Consider m^{2}-1. Rewrite m^{2}-1 as m^{2}-1^{2}. The difference of squares can be factored using the rule: a^{2}-b^{2}=\left(a-b\right)\left(a+b\right).
4\left(m-1\right)\left(m+1\right)
Rewrite the complete factored expression.
4m^{2}-4
Combine m^{2} and 3m^{2} to get 4m^{2}.
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Limits
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