Iwant to learn how to do this problem

Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

Graph the equation. select integers for x

This is my question~~ ( r ^ 4 - 2r ^ 3 - 23 r ^ 2 - 4r - 32)÷(r+4) ~~ i must use long division to solve it : / i was wondering if anyone world like to solve it. and if so, share step-by-step explanations! you! ❤