3/(x-3)-(x+15)/(x^2-9)-2/x

Question

3/(x-3)-(x+15)/(x^2-9)-2/x

Answer 1

3/х-3 - х+15/(х-3)(х+3) - 2/х

3х(х+3)-х(х+15)-2(х-3)(х+3) / х(х-3)(х+3)

3х²+9х-х²-15х-2(х²-9) / х(х-3)(х+3)

3х²+9х-х²-15х-2х²+18 / х(х-3)(х+3)

0-6х+18 / х(х-3)(х+3)

-6(х-3) /  х(х-3)(х+3)

-6 / х(х+3)

Ответ

-6 / х² + 3х