Subtract rational expressions

2 1

------ - ------

(x+5) (x-5)

Like any fraction, to add tow rational expressions you need to put them over a common denominator, in this case (x+5)(x-5)

2 *(x-5) 1*(x+5) 2x-10-x-5 x-15

------ ------ - ------------- = -------------- = ---------------

(x+5)(x-5) (x-5)(x+5) (x-5)(x+5) (x

------ ------ - ------------- = -------------- = ---------------

(x+5)(x-5) (x-5)(x+5) (x-5)(x+5) (x

^{2}-25)