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72b^{2}+21b-18
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72b^{2}+21b-18
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72b^{2}-27b+48b-18
Apply the distributive property by multiplying each term of 9b+6 by each term of 8b-3.
72b^{2}+21b-18
Combine -27b and 48b to get 21b.
72b^{2}-27b+48b-18
Apply the distributive property by multiplying each term of 9b+6 by each term of 8b-3.
72b^{2}+21b-18
Combine -27b and 48b to get 21b.
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