Question

Решите систему уравнений

Answer 1

$\displaystyle \left \{ {{2x+y=1} \atop {x^2-11x-2y=-14}} \right.\\\\\left \{ {{y=1-2x} \atop {x^2-11x-2y=-14}} \right.\\\\x^2-11x-2(1-2x)=-14\\x=3,x=4\\y=1-2*3,y=1-2*4\\y=-5,y=-7\\(x_1,y_1)=(3,-5),(x_2,y_2)=(4,-7)$