Evaluate
\left(4-5a\right)\left(3a+1\right)
Expand
4+7a-15a^{2}
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12a-15a^{2}+4-5a
Apply the distributive property by multiplying each term of 3a+1 by each term of 4-5a.
7a-15a^{2}+4
Combine 12a and -5a to get 7a.
12a-15a^{2}+4-5a
Apply the distributive property by multiplying each term of 3a+1 by each term of 4-5a.
7a-15a^{2}+4
Combine 12a and -5a to get 7a.
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