Ep=Em

Curseur X

Ep(x) = x^(4) + (0.5 * x^(3)) - (3 * x^(2))
Em = -1.1 (slider from -5 to 5, step 0.05)
v_+(x) = sqrt(Em - Ep(x))
v_-(x) = (-sqrt(Em - Ep(x)))
D: y = Em
Curseur = -1.23 (slider from -3 to 3, step 0.01)
A: (Curseur, Ep(Curseur))
a = Line((Curseur, 0), A)