Решите систему уравнений /8 класс .СРОЧНО[tex] \left \{ {{x-y=4 } \atop { x^{2}+ 2xy+ y^{2} }=4} \right. [/tex]. Created by mskomkozavra. algebra-ru

1. 2x = 2x = 12. 2x = 6x = 3Ответ: (1; - 3) или (3; - 1).

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Решите систему уравнений /8 класс .СРОЧНО[tex] \left \{ {{x-y=4 } \atop { x^{2}+ 2xy+ y^{2} }=4} \right. [/tex]

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Azzaires $\left \{ {{x-y=4} \atop {x^{2}+2xy+y^{2}=4}} \right.$
$\left \{ {{x-y=4} \atop {(x+y)^{2}=4}} \right.$
$\left \{ {{x-y=4} \atop {(x+y)^{2}=4}} \right.$
$\left \{ {{x-y=4} \atop {x+y=+-2}} \right.$
1. $\left \{ {{x-y=4} \atop {x+y=-2}} \right.$
2x = 2
x = 1
$\left \{ {{x=1} \atop {1+y=-2}} \right.$
$\left \{ {{x=1} \atop {y=-3}} \right.$
2. $\left \{ {{x-y=4} \atop {x+y=2}} \right.$
2x = 6
x = 3
$\left \{ {{x=3} \atop {3+y=2}} \right.$
$\left \{ {{x=3} \atop {y=-1}} \right.$

Ответ: (1; - 3) или (3; - 1).

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