1、Z2[（x2-4-5）/(X+2)]*[2(X+2)/(X-3)] =Z2[（x+3）(X-3)/(X+2)]*[2(X+2)/(X-3)] =2（x+3）Z2 =2(√2-3+3)Z2 =(2√2)Z2 2、X/(X-1)+3/(X-1)=2 X+3=2(X-1) X=5
