Question

ПОМОГИТЕ ПОЖАЛУЙСТА ДАЮ 50 БАЛЛОВ

Answer 1

Ответ:

Задача :

x + y = 12

x^2 + y^2 = 24

x= 12-y

( 12-y )^2 - y^2 = 24

12^2 - 2 × 12 × y + y^2 - y^2 - 24 = 0

141 -24 × y = 24

24 × y = 120

y = 120/24

y = 5

x + 5 = 12

x = 12 - 5

x = 7

( 7; 5 )

Система :

x + y = 8

x × y = 7

x = 8 - y

(8 - y) × y = 7

y^2 - 8y + 7 = 0

y1 + y2 = 8

y1 × y2 = 7

y1 = 7

y2 = 1

x + 7 = 8

x = 8 - 7

x = 1

( 1; 7 )

x + 1 = 8

x = 7

( 7; 1)