2x-3y+5=0x+y-2=0解得y=9/5x=1/5
若(2x-3y+5)²+l x+y-2 l=0得:2x-3y+5=0,x+y-2=0解二元一次方程组,得:x=1/5,y=9/5
2x-3y+5=ox+y-2=o x=1/5y=9/5