math exam prep question
posted by Nikki on .
how do u do 9x^2-30xy+2y^2 ?
what do you mean by "do"? factor?
you can use the quadratic formula to get
x = (30±√(900+72y^2))/18
no simplify sorry forgot to specify..
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.