x^2=3x+1
3X3-11X2+3X+2
=3x*x^2-11x^2+3x+2
=3x(3x+1)-11(3x+1)+3x+2
=9x^2+3x-33x-11+3x+2
=9(3x+1)-27x-9
=27x+9-27x-9
=0