I need help with math 1010 completing the square x^2-9x=10

asked Jul 15, 2015 65.7k views

3 votes

I need help with math 1010
completing the square
x^2-9x=10

by Jivay

8.2k points

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4 votes

$x^2-9x=10|+20.25\\ x^2-9x+20.25=30.25\\ (x-4.5)^2=30.25\\ x-4.5=5.5 \vee x-4.5=-5.5\\ x=10 \vee x=-1$

Inokey answered Jul 19, 2015

8.0k points

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