“Quartic Polynomials.” Beyond the Quadratic Formula, by Ron Irving, 1st ed., Mathematical Association of America, 2013, pp. 143–178, www.jstor.org/stable/10.4169/j.ctt5hh9sp.9. Accessed 23 July 2021.
Irving, R. (2013). Quartic Polynomials. In Beyond the Quadratic Formula (pp. 143-178). Mathematical Association of America. Retrieved July 23, 2021, from http://www.jstor.org/stable/10.4169/j.ctt5hh9sp.9
Irving, Ron. "Quartic Polynomials." In Beyond the Quadratic Formula, 143-78. Mathematical Association of America, 2013. Accessed July 23, 2021. http://www.jstor.org/stable/10.4169/j.ctt5hh9sp.9.
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