Verified answer

Ответ:

[tex] \frac{y}{ {(y + 6)}^{2} } - \frac{y}{ {y}^{2} - 3 6} = \frac{y}{ {(y + 6)}^{2} } - \frac{y}{(y - 6)(y + 6)} = \frac{y(y - 6) - y(y + 6)}{(y - 6) {(y + 6)}^{2} } = \frac{ {y}^{2} - 6y - {y}^{2} - 6y }{(y - 6) {(y + 6)}^{2}} = \frac{ - 12y}{(y - 6) {(y + 6)}^{2}} [/tex]

знаменатель: (у+6)(у-6)(у+6)