Question

x+y= 10; ((x-1) (y+1)=0 помогите прошу люди​

Answer 1

Ответ:

\ (x - 1)(y + 10) = 9 . \ x = 11 + y

\ x - y = 11 =>. \ (11 + y - 1)(y + 10) = 9

(y + 10)(y + 10) = 9 (y + 10) ^ 2 = 9 y + 10 =-/^ sim 9^ sim y = - 7 y = 7 X = 11 + y X = 11 + (- 7) = 4 X = 11 + 7 = 18

y + 10 = 3 y + 10 = - 3

Ответ:

(4;-7); (18;7)