(x^3+6x^2+11x+6) =(x^3+3x^2)+(3x^2+11x+6) =x^2(x+3)+(x+3)(3x+2) =(x+3)(x^2+3x+2)=(x+3)(x+2)(x+1)
x^3+6x^2+11x+6=(x+2)(x^2+4x+3)=(x+2)(x+1)(x+3)
