x/(x-1)+(5x-2)/(x²+x）=1x(x²+x）+(5x-2)(x-1)=(x-1)(x²+x）x³+x²+5x²-7x+2=x³-xx³-x³+x²+5x²-7x+x+2=06x²-6x+2=0x²-x=-1/3x²-x+1/4=1/4-1/3(x-1/2)²=-1/12无实数解x-1/2=±√3i/6
x等于一
