Homework Help: Math

Posted by Anon on Monday, July 2, 2012 at 8:31pm.

((25/a)- a)/ (5 + a)

I know the answer comes to (5-a)/a but I can't figure out how to simplify it to this. I've gotten close but I'm not sure. Its probably easier than I'm making it out to be.

Math - Quidditch, Tuesday, July 3, 2012 at 12:33am
Try multiplying by a/a.
Math - Reiny, Tuesday, July 3, 2012 at 12:37am
easiest way.....
multiply top and bottom of the main fraction by a to get
(25-a^2) / (a(5+a) )
= (5+a)(5-a)/(a(5+a) )
= (5-a)/a

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