# What is the graph of the Cartesian equation #(x^2 + y^2 - 2ax)^2 = b^2(x^2 + y^2)#?

##### 1 Answer

Jul 31, 2016

#### Answer:

two versions of the same cardioid

#### Explanation:

Taking

and then separately, after substituting

So, in polar coordinates reduces to

Attached a plot showing in red

and in blue

for ·