x^3-2x^2+3=0x³+x²-3x²+3=0x²﹙x+1﹚-3﹙x+1﹚﹙x-1﹚=0﹙x+1﹚﹙x²-3x+3﹚=0x+1=0x=-1
原式x(x^2-2x+3/x)=0 x(x^2-2x^2+3)=0 -x^2+3=0 -x^2=-3 x=±根号3
-1