Evaluate
3\left(13m-15n\right)\left(11m+5n\right)
Expand
429m^{2}-300mn-225n^{2}
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429m^{2}-495mn+195nm-225n^{2}
Apply the distributive property by multiplying each term of 33m+15n by each term of 13m-15n.
429m^{2}-300mn-225n^{2}
Combine -495mn and 195nm to get -300mn.
429m^{2}-495mn+195nm-225n^{2}
Apply the distributive property by multiplying each term of 33m+15n by each term of 13m-15n.
429m^{2}-300mn-225n^{2}
Combine -495mn and 195nm to get -300mn.
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