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16m^{2}-49
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16m^{2}-49
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-28m-49+16m^{2}+28m
Apply the distributive property by multiplying each term of -7+4m by each term of 4m+7.
-49+16m^{2}
Combine -28m and 28m to get 0.
-28m-49+16m^{2}+28m
Apply the distributive property by multiplying each term of -7+4m by each term of 4m+7.
-49+16m^{2}
Combine -28m and 28m to get 0.
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