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20-06-2017
Mathematics

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Solve x^2 – 12x + 36 = 90 for x

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mathmate mathmate

25-06-2017

x^2-12x+36=90
x^2-12x-64=0
factor: (x-16)(x+4)=0
by the zero product theorem,
x-16=0 or x+4=0
=>
x=16 or x=-4

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