posted by luis on .
x^2 + 9x + 20 over x^2 -25 divided by x +4 over x - 4
How to do this really confusing i need to simplify the rational expression
I 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