Question

X-y=2 x2+xy=4

Система рівнянь

Answer 1

$x - y = 2 \\ {x}^{2} + xy = 4 \\ \\ y = x - 2 \\ {x}^{2} + x(x - 2) = 4 \\ \\ y = x - 2 \\ {x}^{2} + {x}^{2} - 2x - 4 = 0\\ \\ y = x - 2 \\ 2 {x}^{2} - 2x - 4 = 0 \\ \\ y = x - 2 \\ {x}^{2} - x - 2 = 0 \\ \\ y = x - 2 \\ x_1 = 2 \\ x_2 = - 1 \\ \\ y_1 = 2 - 2 = 0 \\ y_2 = - 1 - 2 = - 3 \\ x_1 = 2 \\ x_2 = - 1$

Ответ:

$(2;0);( - 1; - 3)$