x^3-2x^2+1=0x³-x²-x²+1=0x²(x-1)-(x-1)(x+1)=0(x-1)(x²-x-1)=0x-1=0或x²-x-1=0x-1=0解得：x=1x²-x-1=0解得：(x-1/2)²=5/4x-1/2=±√5/2x=(1±√5)1/2所以：x=1或x=(1+√5)...