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

User Ekra
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a^2+11a+18=a^2+2a+9a+18=a(a+2)+9(a+2)=\\\\=(a+2)(a+9)
User Kaykae
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a^2+11a+18\\\\-----------------------------\\\\11=9+2\\18=9\cdot2\\\\-----------------------------\\\\a^2+11a+18=(a+9)(a+2)
User Rafael Ruiz Tabares
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