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factor 4x^2-36x+81=9

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Factor 4x^2-36x+81=9

Feb 14th, 2015
4x^2-36x+81=9
Group the like terms together

4x^2-36x+72=0

Divide through by 4

x^2-9x+18=0

Factorise

x^2-3x-6x+18=0

x(x-3)-6(x-3)=0

factors are x-3 and x-6

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Feb 14th, 2015

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