Posted by Clark on Tuesday, October 18, 2011 at 4:05am.
Since x^2 - 25 = (x+5)(x-5),
I'd say x+5 is the greatest common divisor.
Since we have no fractions, I don't think we can talk about denominators. (Unless we are in fact talking about denominators of fractions whose numerators are unspecified ...)
oops. In that case, then (x^2-25) would be the LCD.
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