Question

(3) / (x+3)+ (3) / (x^2-3x)+ (2x) / (9-x^2) упростить выражение

Answer 1

3/(x+3) + 3/(x²-3x) + 2x/(9 - x²)=

= 3/(x+3) + 3/(х(x - 3)) - 2x/((х - 3)(х + 3)) =

= 3·х·(х - 3) + 3·(х + 3) - 2х·х =

= 3х² - 9х + 3х + 9 - 2х² =

= х² - 6х + 9 =

= (х -3)²