Đề bài

Tính:

a) $(6{x^2} - 2x + 1):(3x - 1)$;                                                    

b) $(27{x^3} + {x^2} - x + 1):( - 2x + 1)$;

c) $(8{x^3} + 2{x^2} + x):(2{x^3} + x + 1)$;                             

d) $(3{x^4} + 8{x^3} - 2{x^2} + x + 1):(3x + 1)$