Factor
m\left(3m-n\right)^{2}
Evaluate
m\left(3m-n\right)^{2}
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m\left(9m^{2}-6mn+n^{2}\right)
Factor out m.
\left(3m-n\right)^{2}
Consider 9m^{2}-6mn+n^{2}. Use the perfect square formula, a^{2}-2ab+b^{2}=\left(a-b\right)^{2}, where a=3m and b=n.
m\left(3m-n\right)^{2}
Rewrite the complete factored expression.
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