exam Maths Puzzle Numerical Ability

Can someone help me* my problem is to find a polynomial function of degree 3 with the given numbers as zeros. 2, i, -i

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exam Other Question

Can you please help me find:
center, vertices, covertices and foci of the ellipse x^2/4+y^2/9=16
Thank you so much!! Find the maximum value od C=2x+y on the region determined by the constraints

{x+y <= 6
{0 <= x <=4
{0 <= y <=4

Possible choices
a. 8
b. 10
c. 12
d. 14