Hi there!

First subtract 3x^2 from both sides.

Now rearrange the equation.

Finally we can see our answer.


The base of a cone is something circular, like a circle or an ellipse.
The rest of the options (square, triangle, and pentagon) are all based of pyramids, not cones. Cones have to have a circular base because otherwise they'd be pyramids.
Naw bruv i’m doing the same problems rn and i’m struggling gl tho