Решите систему: 2xy=1 4y-x=1
X=4y-1 2y*(4y-1)=1 8y²-2y-1=0 D=4+32=36 y1=(2-6)/16=-1/4⇒x1=4*(-1/4)-1=-1-1=-2 y2=(2+6)/16=1/2⇒x2=4(1/2-1=2-1=1 (-2;-1/4) (1;1/2)