x²-5x-2004=0x²-5x=2004（x-2）³-（x-1）²+1/（x-2）=(x³-6x²+12x-8-x²+2x-1+1)/(x-2)=(x³-7x²+14x-8)/(x-2)=x²-5x+4=2004+4=2008