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12a^{2}-31a-3
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12a^{2}-31a-3
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6a^{2}+2a-9a-3+6a\left(a-4\right)
Apply the distributive property by multiplying each term of 2a-3 by each term of 3a+1.
6a^{2}-7a-3+6a\left(a-4\right)
Combine 2a and -9a to get -7a.
6a^{2}-7a-3+6a^{2}-24a
Use the distributive property to multiply 6a by a-4.
12a^{2}-7a-3-24a
Combine 6a^{2} and 6a^{2} to get 12a^{2}.
12a^{2}-31a-3
Combine -7a and -24a to get -31a.
6a^{2}+2a-9a-3+6a\left(a-4\right)
Apply the distributive property by multiplying each term of 2a-3 by each term of 3a+1.
6a^{2}-7a-3+6a\left(a-4\right)
Combine 2a and -9a to get -7a.
6a^{2}-7a-3+6a^{2}-24a
Use the distributive property to multiply 6a by a-4.
12a^{2}-7a-3-24a
Combine 6a^{2} and 6a^{2} to get 12a^{2}.
12a^{2}-31a-3
Combine -7a and -24a to get -31a.
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Limits
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