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Posted by on Tuesday, March 17, 2009 at 1:26am.

which number cann be used in place of the variable in each rational expression
a^2-b^2/a-b

  • math - , Tuesday, March 17, 2009 at 8:31am

    What you have written equals a + b, because the numerator equals (a+b)(a-b); so the a-b term cancels the denominator.

    Your question is unclear. Both a and b can be any number.

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