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How do you factorise

-13x^2+113x-22

  • Math -

    That polynomial does not factor simply.
    The roots of -13x^2+113x-22 = 0
    are real numbers, since b^2 - 4 ac = 11625. The expression can be written
    -13(x- A)(x-B), where A and B are
    A = (-113 + sqrt 11625)/-26 = 0.19926
    and
    B = (-113 - sqrt 11625)/-26 = 8.49305

    -13x^2+113x-22 =
    = -13(x-0.19926)(x-8.49305)
    = (-13x+2.59038)(x-8.49305)

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