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Math Help - Factor this expression to a+b

  1. #1
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    Factor this expression to a+b

    How would you factor the following to a+b?

    (a^3 + b^3)/(a^2 -ab +b^2)


    I can tell, through substitution, that it's a+b, but I can't figure out how to factor it.
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  2. #2
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    x^3 + y^3 =(x+y)(x^2 -xy + y^2)
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  3. #3
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    Thanks!
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