y=(-2x+1)(2x-4)(3x-1)y=(−2x+1)(2x−4)(3x−1)
color(white)(aaaaaaaaaaaaa)aaaaaaaaaaaaa-2x+1−2x+1
color(white)(aaaaaaaaaaaa)aaaaaaaaaaaa xx underline(2x-4)
color(white)(aaaaaaaaaaaaa)-4x^2+2x
color(white)(aaaaaaaaaaaaaaaaaaaa)8x-4
color(white)(aaaaaaaaaaaaaa)overline(-4x^2+10x-4)
color(white)(aaaaaaaaaaaaa) xx 3x-1
color(white)(aaaaaaaaaaaaaa)overline(-12x^3+30x^2-12x)
color(white)(aaaaaaaaaaaaaaaaaaaaaaa)4x^2-10x+4
color(white)(aaaaaaaaaaa)color(blue)(y=overline(-12x^3+34x^2-22x+4)