(3+y)*y = -2
3y+y²= -2
y²+3y+2 = 0
D = 3² - 4*2 = 9-8 = 1
x₁ = 3+y₁ = 3-1 = 2
x₂ = 3+y₂ = 3-2 = 1
ответ: ( 2; -1 ) , ( 1; -2 )
(3+y)*y = -2
3y+y²= -2
y²+3y+2 = 0
D = 3² - 4*2 = 9-8 = 1
x₁ = 3+y₁ = 3-1 = 2
x₂ = 3+y₂ = 3-2 = 1
ответ: ( 2; -1 ) , ( 1; -2 )