Wednesday
April 16, 2014

Homework Help: Algebra

Posted by rob on Friday, January 2, 2009 at 3:17pm.

I have to solve the following equation:

x+y=9
xy=54

I changed the first equation to y=9-x to solve for y. I got x(9-x)=54 and then 9x-x^2=54. I then changed 9x-x^2= 54 to -x^2 +9x-54=0. I got stuck around here, can someone explain...

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