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ulyanovanadezh
@ulyanovanadezh
July 2022
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Решите уравнения( сложением и подстановкой)
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IrkaShevko
Verified answer
1)
1) x = 1
y(1+y)=2
y² + y - 2 = 0
D = 1 + 8 = 9
y₁ = (-1-3)/2=-2
y₂ = (-1+3)/2=1
Ответ: (-2; 1); (1; -2); (1; 1)
2)
y²= 4
y₁ = -2
y₂ = 2
x₁(1-2)=3
x₁ = -3
x₂(1+2)=3
x₂ = 1
Ответ: (-3; -2); (1; 2)
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ulyanovanadezh
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Answers & Comments
Verified answer
1)1) x = 1
y(1+y)=2
y² + y - 2 = 0
D = 1 + 8 = 9
y₁ = (-1-3)/2=-2
y₂ = (-1+3)/2=1
Ответ: (-2; 1); (1; -2); (1; 1)
2)
y²= 4
y₁ = -2
y₂ = 2
x₁(1-2)=3
x₁ = -3
x₂(1+2)=3
x₂ = 1
Ответ: (-3; -2); (1; 2)