load(draw);

xx: [0,-2,2]$
yy: [1,4,4]$
zz: [-2,28,28]$
draw3d(
    palette      = [4,5,6],
    surface_hide = true,
    xu_grid      = 20,
    yv_grid      = 20,
    colorbox     = false,

    color=green,
    explicit(3*x^2+2*y^2-4*y, x ,-2.5, 2.5, y, -2.5, 5),
    color=blue,
    implicit(y=x^2,x,-2.5,2.5, y,-2.5,5, z,-2.5,30),
point_size = 3,
       point_type = filled_circle,
       color      = red,
       points(xx,yy,zz));