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72+148m-80m^{2}
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72+148m-80m^{2}
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72-32m+180m-80m^{2}
Apply the distributive property by multiplying each term of 8+20m by each term of 9-4m.
72+148m-80m^{2}
Combine -32m and 180m to get 148m.
72-32m+180m-80m^{2}
Apply the distributive property by multiplying each term of 8+20m by each term of 9-4m.
72+148m-80m^{2}
Combine -32m and 180m to get 148m.
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