Determine in C [ X ] {\displaystyle {}\mathbb {C} [X]} , using the Euclidean algorithm, the greatest common divisor of the polynomials X 3 + ( 2 − i ) X 2 + 4 {\displaystyle {}X^{3}+(2-{\mathrm {i} })X^{2}+4} and ( 3 − i ) X 2 + 5 X − 3 {\displaystyle {}(3-{\mathrm {i} })X^{2}+5X-3} .