(x-1/x)平方-3x+3/x+2=0(x-1/x)^2-3(x-1/x)+2=0(x-1/x-2)(x-1/x-1)=0(x-1/x-2)=0或(x-1/x-1)=0(1) x-1/x-2=0x^2-2x-1=0用公式法解得x=2±√2^2+4*1/2=1±√2(2）x-1/x-1=0x^2-x-1=0用公式法解得x=1±√1+4*1/2=1±√...