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Math Help - using -1 as a factor

  1. #1
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    using -1 as a factor

    somebody help me with this problem

    b-7
    7-b
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  2. #2
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    Quote Originally Posted by michaelmitchell View Post
    somebody help me with this problem

    b-7
    7-b
    What are you meant to do? Simplify? \frac{b - 7}{7 - b} = \frac{-(7 - b)}{7 - b} = -1.
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