The first thing you must do in this case is to perform the polynomial division taking into account properties of exponents.
We see that the division in this case is inaccurate.
In non-integer (or inaccurate) divisions, the dividend D (x) is not a multiple of the divisor d (x), and the fundamental property of the division will always be fulfilled:
D (x) = d (x) * c (x) + R (x)
Answer:
See attached image for the solution.