where n represents the degree of this equation and a 0, a 1, a 2, …, a n−1, an, are constant coefficients, real or imaginary. A root of this equation is any expression,real or imaginary, that when substituted in place of the unknown value x, makes the left-hand side equal to zero.
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Bradley, R.E., Sandifer, C.E. (2009). On real or imaginary roots of algebraic equations for which the left-hand side is a rational and integer function of one variable. The solution of equations of this kind by algebra or trigonometry.. In: Cauchy’s Cours d’analyse. Sources and Studies in the History of Mathematics and Physical Sciences. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-0549-9_10
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DOI: https://doi.org/10.1007/978-1-4419-0549-9_10
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