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42b^{2}-112b+48
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42b^{2}-112b+48
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42b^{2}-48b-8\left(8b-6\right)
Use the distributive property to multiply 6b by 7b-8.
42b^{2}-48b-64b+48
Use the distributive property to multiply -8 by 8b-6.
42b^{2}-112b+48
Combine -48b and -64b to get -112b.
42b^{2}-48b-8\left(8b-6\right)
Use the distributive property to multiply 6b by 7b-8.
42b^{2}-48b-64b+48
Use the distributive property to multiply -8 by 8b-6.
42b^{2}-112b+48
Combine -48b and -64b to get -112b.
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