Find the quotient when each of these polynomials are divided by
the expression in brackets.
a) 2x^3 + x^2 -13x + 6/ (x-2)
b) x^3 -3x - 2/ (x-2)
c) x^3 - x^2 -4/ (x-2)
d) 2x^3 -x -1/ (x-1)