Ответ:
Объяснение:X = y + 4
(y + 4) ² + 2y (y + 4) + y² = 4
y² + 8y + 16 + 2y² + 8y + y² = 4
4y² + 16y + 12 = 0
4 (y² + 4y + 3) = 0
D = 16 - 12 = 4 = 2²
y1 = ( - 4 + 2) : 2 = - 1
y2 = ( - 4 - 2) : 2 = - 3
x1 = - 1 + 4 = 3
x2 = - 3 + 4 = 1
Ответ (3; - 1); (1; - 3)
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Ответ:
Объяснение:X = y + 4
(y + 4) ² + 2y (y + 4) + y² = 4
y² + 8y + 16 + 2y² + 8y + y² = 4
4y² + 16y + 12 = 0
4 (y² + 4y + 3) = 0
D = 16 - 12 = 4 = 2²
y1 = ( - 4 + 2) : 2 = - 1
y2 = ( - 4 - 2) : 2 = - 3
x1 = - 1 + 4 = 3
x2 = - 3 + 4 = 1
Ответ (3; - 1); (1; - 3)