Question

Решите систему уровнений (А и Б)

Answer 1

$a)\; \; \left \{ {{3y-x=-4} \atop {x-y=6}} \right. \; \oplus \left \{ {{2y=2} \atop {x=y+6}} \right. \; \left \{ {{y=1} \atop {x=7}} \right. \; \; \to \; \; (7,1)\\\\b)\; \; \left \{ {{x^2+y=14} \atop {y-x=8}} \right. \; \ominus \left \{ {{x^2+x=6} \atop {y=x+8}} \right. \; \left \{ {{x^2+x-6=0} \atop {y=x+8}} \right. \; \left \{ {{x_1=-3\; ,\; x_2=2} \atop {y_1=5\; ,\; y_2=10}} \right. \; \to \; \; (-3,5)\; ,\; (2,10)$