Решите системы уравнений
{x+y=-2 y^2-3x=6
{x^2+y^2=17 y-x=3
{x-y=1 x-4y^2=1
{x+2y^2=4 x-y=4

1{x+y=-2 ⇒x=-y-2{y^2-3x=6y²+3y+6-6=0y²+3y=0y(y+3)=0y=0⇒x=-2y=-3⇒x=1(-2;0);(1;-3)2 {x^2+y^2=17 {y-x=3⇒y=3+xx²+9+6x+x²-17=02x²+6x-8=0x²+3x-4=0x1+x2=-3 U x1*x2=-4x1=-4⇒y1=-1x2=1⇒y2=4(-4;-1);(1;4)3 {x-y=1 ⇒x=1+y{x-4y^2=11+y-4y²-1=0y-4y²=0y(1-4y)=0y=0⇒x=1y=1/4⇒x=1 1/4(1;0);(1 1/4;1/4)4 {x+2y^2=4 {x-y=4отнимем2y²+y=0y(2y+1)=0y=0⇒x-0=4⇒x=4y=-0,5⇒x+0,5=4⇒x=3,5(4;0);(3,5;-0,5)