(x + 2r - k)² (k + x) = (k - x) y²

r = 0.8 (slider from -5 to 5, step 0.1)
k = 2 (slider from -5 to 5, step 0.1)
a: ((x + (2 * r) - k)^(2) * (k + x)) = ((k - x) * y^(2))
b: x = k
D: (k - (2 * r), 0)
Text1: "" + a + ""