Question

Решите пожалуйста подробно

Answer 1

(х-5)²/(х+7) : (2х-10)/(3х+21)
(х-5)²/(х+7) * (3х+21)/(2х-10)
(х-5)²/(х+7) * 3(х+7)/2(х-5) = 3(х-5)/2=(3х-15)/2