方程组:①(x+y)(x-y+2)=0,X2+Y2=8.②2X-3X-1=0;2X2-3XY+Y2-4X+3Y-3=0

问题描述:

方程组:①(x+y)(x-y+2)=0,X2+Y2=8.②2X-3X-1=0;2X2-3XY+Y2-4X+3Y-3=0