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July 25, 2014

July 25, 2014

Posted by **luis** on Saturday, February 25, 2012 at 7:09pm.

How to do this really confusing i need to simplify the rational expression

- Math -
**Reiny**, Saturday, February 25, 2012 at 7:54pmI read that as

(x2+9x+20)/(x^2-25) ÷ (x+4)/(x-4)

= (x+4)(x+5)/((x+5)(x-5)) ( x-4)/(x+4)

= (x-4)/(x-5) , x ≠ ±5,±4

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