e Laguerre series basis polynomials aren't powers of `x` so the
    results of this function may seem unintuitive.

    Examples
    --------
    >>> from numpy.polynomial.laguerre import lagroots, lagfromroots
    >>> coef = lagfromroots([0, 1, 2])
    >>> coef
    array([  2.,  -8.,  12.,  -6.])
    >>> lagroots(coef)
    array([-4.4408921e-16,  1.0000000e+00,  2.0000000e+00])

    r