Предмет: Алгебра, автор: guhevakarina

Виконайте дії:
5xa/x-a + 5a²/a-x

знайдіть значення виразу якщо
у=3
у²/у-2 - 4у-4/у-2​

Ответы

Автор ответа: tarasgyska
1

 \frac{5xa}{x - a}  +  \frac{5 {a}^{2} }{a - x}  =  \frac{5ax}{x - a}  -  \frac{5 {a}^{2} }{x - a}  =  \frac{5ax - 5 {a}^{2} }{x - a}  =  \frac{5a(x - a)}{x - a}  = 5a

 \frac{ {y}^{2} }{y - 2}  -  \frac{4y - 4}{y - 2}  =  \frac{ {y}^{2} - 4y - 4 }{y - 2}  =  \frac{ {(y - 2)}^{2} }{y - 2}  = y - 2

y = 3 \\ 3 - 2 = 1

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