atriftaloide, cartesiana

x^4 (x^2 + y^2) - (k x^2 -h )^2=0

h, k  R+

k = 5 (slider from 0.5 to 5, step 0.1)
h = 0.5 (slider from 0.5 to 5, step 0.1)
a: x^(4) * (x^(2) + y^(2)) - (k * x^(2) - h)^(2) = 0