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3+5m-12m^{2}
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3+5m-12m^{2}
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-12m^{2}+9m-4m+3
Apply the distributive property by multiplying each term of -3m-1 by each term of 4m-3.
-12m^{2}+5m+3
Combine 9m and -4m to get 5m.
-12m^{2}+9m-4m+3
Apply the distributive property by multiplying each term of -3m-1 by each term of 4m-3.
-12m^{2}+5m+3
Combine 9m and -4m to get 5m.
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