math exam prep question

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

  • math exam prep question -

    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

  • math exam prep question -

    no simplify sorry forgot to specify..

  • math exam prep question -

    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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