x+y+5±2=0x+y+5 \pm \sqrt{2}=0x+y+5±2=0
x+y−5±2=0x+y-5 \pm \sqrt{2}=0x+y−5±2=0
x+y−5±22=0x+y-5 \pm 2 \sqrt{2}=0x+y−5±22=0
x+y+5±22=0x+y+5 \pm 2 \sqrt{2}=0x+y+5±22=0
x+y+7±22=0x+y+7 \pm 2 \sqrt{2}=0x+y+7±22=0