(x-2)(x^2+6x+9)=6(x-3)
x^3+6x^2+9x-2x^2-12x-18=6x-18; x^3+4x^2-9x=0 x*(x^2+4x-9)=0 x1=0 или х^2+4x-9=0 D=16+4*9=4*13 x2=(-4-2sqrt(13)/2=-2-sqrt(13) x3=(-4+2sqrt(13)/2=-2+sqrt(13)