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Math Help - ration expressions

  1. #1
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    ration expressions

    x2+x-12 . x2^ - 2x-3
    x-3 x2^+5x+4

    the 2^ is to the second power
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  2. #2
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    Hello michaelmitchell
    Quote Originally Posted by michaelmitchell View Post
    x2+x-12 . x2^ - 2x-3
    x-3 x2^+5x+4

    the 2^ is to the second power
    I'm guessing that you mean:

    Simplify \frac{x^2+x-12}{x-3}\cdot\frac{x^2-2x-3}{x^2+5x+4}

    In which case you factorise the quadratic expressions to get:

    \frac{(x-3)(x+4)}{x-3}\cdot\frac{(x-3)(x+1)}{(x+4)(x+1)}

    and then divide out the common factors to get

    \frac{x+4}{1}\cdot\frac{x-3}{x+4}

    and simplify further to get

    x-3

    Grandad
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