* @param decimalPlaces
     * @param a_RoundingMode
     * @return The rootRoundIfNecessary rootRoundIfNecessary of x to
     * decimalPlaces precision.
     */
    private static BigDecimal rootLessThanOneNoRounding(
            BigDecimal x,
            int root) {
        return rootLessThanOneNoRounding(
                x,
                BigInteger.valueOf(root));
    }