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## Homework Statement

Establish an equation in polar coordinates for the curve x^2+y^2=4y-2x

## Homework Equations

n/a

## The Attempt at a Solution

I know that x^2+y^2=r^2 so I used substitution, and now have r^2=4y-2x. Now this next part, I'm really not sure if I'm allowed to do this... i know that [email protected] (let @=theta) and [email protected] So i simply substituted to get r^[email protected]@. Is that allowed? Also, i feel like my answer should just look like r=..... So should I take the sqaure root of both sides?

Thank you, very appreciated.