x=22,y=22x=2 \sqrt{2}, y=2 \sqrt{2}x=22,y=22
x±22=0x \pm 2 \sqrt{2}=0x±22=0
x+22=0,y+22=0x+2 \sqrt{2}=0, y+2 \sqrt{2}=0x+22=0,y+22=0
y±22=0y \pm 2 \sqrt{2}=0y±22=0