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2a^{2}+13a+12
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2a^{2}+13a+12
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2a^{2}+10a+3\left(a+4\right)
Use the distributive property to multiply 2a by a+5.
2a^{2}+10a+3a+12
Use the distributive property to multiply 3 by a+4.
2a^{2}+13a+12
Combine 10a and 3a to get 13a.
2a^{2}+10a+3\left(a+4\right)
Use the distributive property to multiply 2a by a+5.
2a^{2}+10a+3a+12
Use the distributive property to multiply 3 by a+4.
2a^{2}+13a+12
Combine 10a and 3a to get 13a.
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