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3 votes
How to factor: a^2+11a+18

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User Ekra
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2 Answers

3 votes

a^2+11a+18=a^2+2a+9a+18=a(a+2)+9(a+2)=\\\\=(a+2)(a+9)
answered
User Kaykae
by
8.0k points
4 votes

a^2+11a+18\\\\-----------------------------\\\\11=9+2\\18=9\cdot2\\\\-----------------------------\\\\a^2+11a+18=(a+9)(a+2)

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