(x-2²)+丨y-1丨=0所以(x-2²)=0,丨y-1丨=0x=2,y=1所以x+2y=2+2=4
是(x-2)²+丨y-1丨=0所以x-2=y-1=0x=2,y=1所以x+2y=2+2=4
(x-2²)+丨y-1丨=0所以x=4, y=1x+2y=4+2*1=6
(x-2²)应该是(x-2)²则x=2y=1x+2y=4