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Автор - rinalazygirl23

{х^2+у^2=72
х-у=2

решите систему уравнений​

Ответ

Проверено экспертом

Автор - sangers1959

Ответ:

Объяснение:

{x²+y²=72       {(y+2)²+y²=72             {y²+4y+4+y²=72

{x-y=2             {x=y+2                        {x=y+2

2y²+4x-68=0  |÷2

y²+2x-34=0     D=140     √D=2√35

y₁=-1+√35     ⇒     x₁=1+√35

y₂=-1-√35     ⇒     x₂=1-√35.

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