[tex] {y}^{2} imes (x - 5) = 25 imes (x - y)[/tex] - id970645320200530 от solppoli 30.05.2020 13:00

Question

Алгебра: [tex] {y}^{2} 	imes (x - 5) = 25 	imes (x - y)[/tex] ​

solppoli · Accepted Answer

X(x - 1) + 5y(x - 1) = 7
(x - 1) (x + 5y) = 7
Существует четыре варианта: 1) x - 1 =7 , x + 5y = 1 , 2) x - 1 = 1 , x + 5y = 7 , 3) x - 1 = - 1, x + 5y = - 7 , 4) x - 1 = - 7 , x + 5y = - 1
1) x - 1 = 7
      x = 8       8 + 5y = 1
                 5y = - 7
                     y = - 1,4
2) x - 1 = 1
    x = 2         2 + 5y = 7
                     5y = 5
                     y = 1
3) x - 1 = - 1         0 + 5y = - 7
    x = 0                 5y = - 7
                             y = - 1,4
4) x - 1 = - 7          - 6 + 5y = - 1
    x = - 6                5y = 5
                               y = 1
ответ: (2 ;1) , (- 6 ; 1)

${y}^{2} \times (x - 5) = 25 \times (x - y)$

MOGZ ответил

​

MOGZ ответил

${y}^{2} \times (x - 5) = 25 \times (x - y)$