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In 1832, Gauss proved a quartic reciprocity law for the complex integers that bear his name.—Quanta Magazine, 1 Nov. 2023 What is the average of the roots of the quartic function f(x)=ax4+bx3+cx2+dx+e? Introduction 5.—Patrick Honner, Quanta Magazine, 24 Mar. 2023 Two years later, Cardano published Ars Magna (Great Art), which contained his and Ferrari’s work on cubic and quartic equations.—Quanta Magazine, 30 June 2022
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