x²+y²+z²-2x+4y-6z+14=0x²-2x+1+y²+4y+4+z²-6z+9=0(x-1)²+(y+2)²+(z-3)²=0∵(x-1)²,(y+2)²,(z-3)²≥0∴(x-1)²=(y+2)²=(z-3)²=0∴x=1,y...