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25-06-2018
Mathematics

contestada

What is the positive solution of x2-36=5x

Respuesta :

03-07-2018

[tex]x^2-36=5x\ \ \ |-5x\\\\x^2-5x-36=0\\\\x^2-9x+4x-36=0\\\\x(x-9)+4(x-9)=0\\\\(x-9)(x+4)=0\iff x-9=0\ \vee\ x+4=0\\\\\boxed{x=9}\ \vee\ x=-4[/tex]

Answer: x = 9

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