x^2-5x-2004=0x^2-5x=2004[(x-2)^3-(x-1)^2+1]/灶春(x-2)=(x-2)^3/(x-2)-[(x-1)^2-1]/(漏辩袜x-2)=(x-2)^2-(x^2-2x+1-1)/(x-2)=x^2-4x+4-(x^2-2x)/(x-2)=x^2-4x+4-x(x-2)/返激(x-2)=x^2-4x+4-x=x^2-5x+4=2004+4=2008