(6x^4+x^3+1)/(2x^2-2)6x4+x3+12x2−2
=(x^3(6x+1)+1)/(2(x^2-1))=x3(6x+1)+12(x2−1)
=((x^3+1)(6x+1))/(2(x+1)(x-1))=(x3+1)(6x+1)2(x+1)(x−1)
=((x+1)(x^2-x+1)(6x+1))/(2(x+1)(x-1))=(x+1)(x2−x+1)(6x+1)2(x+1)(x−1)
=(color(red)cancelcolor(black)((x+1))(x^2-x+1)(6x+1))/(2color(red)cancelcolor(black)((x+1))(x-1))
=((x^2-x+1)(6x+1))/(2(x-1))