a-b=√3+√2b-c=√3-√2相加a-c=2√3a²+b²+c²-ab-bc-ac==(2a²+2b²+2c²-2ab-2bc-2ac)/2=[(a²-2ab+b²)+(b²-2bc+c²)+(c²-2ac+a²)]/2=[(a-b)²+(b-c)&...