3 years ago

What is a the positive solution of x^2 - 36 =5x

Mathematics

1 answer:

Minchanka [31]3 years ago

3 0

Answer:

Step-by-step explanation:

$x^2-36=5x\qquad\text{subtract}\ 5x\ \text{from bot sides}\\\\x^2-5x-36=0\\\\x^2+4x-9x-36=0\qquad\text{distribute}\\\\x(x+4)-9(x+4)=0\\\\(x+4)(x-9)=0\iff x+4=0\ \vee\ x-9=0\\\\x+4=0\qquad\text{subtract 4 from both sides}\\\\x=-40$

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