Math

solve by factoring x^2 -7x-72=0

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  1. no way

  2. thanks for your help Damon!

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    posted by Candice
  3. sqrt (b^2-4ac) = sqrt (337)
    that is not a perfect square so factoring will not work.

  4. So close!
    x^2 - 6x - 72 = (x-12)(x+6)
    x^2 - x - 72 = (x-9)(x+8)

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