Colene263 Colene263

20-05-2014
Mathematics

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

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Аноним Аноним

20-05-2014

[tex]a^2+11a+18\\\\-----------------------------\\\\11=9+2\\18=9\cdot2\\\\-----------------------------\\\\a^2+11a+18=(a+9)(a+2)[/tex]

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kate200468 kate200468

20-05-2014

[tex]a^2+11a+18=a^2+2a+9a+18=a(a+2)+9(a+2)=\\\\=(a+2)(a+9)[/tex]

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