x²+x-1=0
3x²+3x-3=0
x^3+x^2-x=0
3x^3+3x^2-3x=0
3x^3=3x-3x^2
3x³+6x²+2005
=3x-3x^2+6x²+2005
=3x^2+3x+2005
=3+2005
=2008