解:X²=(√2+1)²/(√2-1)²=(3+2√2)/(3-2√2)=(3+2√2)²=17+12√2 Y²=(√3-1)²/(√3+1)²=(4-2√3)/(4+2√3)=7-4√3所以X²-Y²=10+12√2+4√3。