Posted by **Nikki** on Tuesday, January 22, 2013 at 4:15pm.

how do u do 9x^2-30xy+2y^2 ?

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**Steve**, Tuesday, January 22, 2013 at 4:20pm
what do you mean by "do"? factor?

you can use the quadratic formula to get

x = (30±√(900+72y^2))/18

= (5±√(25+2y^2))/3

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**Nikki**, Tuesday, January 22, 2013 at 4:49pm
no simplify sorry forgot to specify..

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**Steve**, Tuesday, January 22, 2013 at 5:32pm
I don't see any way to simplify it.

It doesn't factor with integers, there are no common terms. I suppose by specifying as rotation matrix, it could be rewritten as a standard hyperbola on rotated axes, or intersecting lines, but I doubt that's what you had in mind.

I don't see much to do with it.

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