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Math Help - Factorising Quadratics

  1. #1
    Ned
    Ned is offline
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    Factorising Quadratics

    Can someone please show me a worked example of this:

    -xsquared - 4x + 96

    here is what I've done:

    -xsquared - 4x + 96
    -(xsquared + 4x - 96)
    -(xsquared + 12x - 8x - 96)
    -(x(x + 12) -8(x + 12))
    -(x - 8)(x + 12)

    Can someone tell me where I have gone wrong. Soz, if it is a bit hard to interpret I don't know how to use Latex.
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  2. #2
    MHF Contributor kalagota's Avatar
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    Taguig City, Philippines
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    Quote Originally Posted by Ned View Post
    Can someone please show me a worked example of this:

    -xsquared - 4x + 96

    here is what I've done:

    -xsquared - 4x + 96
    -(xsquared + 4x - 96)
    -(xsquared + 12x - 8x - 96)
    -(x(x + 12) -8(x + 12))
    -(x - 8)(x + 12)

    Can someone tell me where I have gone wrong. Soz, if it is a bit hard to interpret I don't know how to use Latex.
    it is rightly done.. if you are not sure after factoring, try multiplying it and see if it gives you the original statement.
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