Question

{ x+y=3
{x2+y2=5
Пожалуйста помогите

Answer 1

Решение:

x + y = 3

x^2 + y^2 = 5

x = 3 - y

(3 - y)^2 + y^2 = 5

x = 3 - y

9 - 6y + y^2 + y^2 = 5

x = 3 - y

2y^2 - 6y + 4 = 0

x = 3 - y

y^2 - 3y + 2 = 0

x = 3 - y

(y - 2)(y - 1) = 0

x = 3 - 2

y = 2

x = 3 - 1

y = 1

x = 1

y = 2

x = 2

y = 1

Ответ:(1;2)(2;1)