把两个式子相加得到x^2-xy=6整理得y=(x^2-6)/x再代入第二个式子x^2-6+(x^2-6)^2/x^2=4把x^2当作整体可解得x^2=2或x^2=9所以x=±√2或x=±3再把值代入y=(x^2-6)/x中解得x1=√2,y1=-2√2x2=-√2,y2=2√2x3=3,y3=1x4=-3...