François Viète (also known as Francis Vieta) was a French mathematician born on February 5, 1540, and died on February 23, 1603. He is best known for his contributions to algebra, particularly for developing a systematic approach to the application of algebraic methods to geometry, and for introducing new notations that significantly advanced mathematical thinking.
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François Viète worked on algebraic notation and relations between polynomial roots and coefficients.[ref]
François Viète by John Joseph O'Connor and Edmund Frederick Robertson. MacTutor biography: quick information and mathematical work
Portrait of François Viète
. Charles Méryon (1821–1868), posthumous etching of François Viète; Art Institute of Chicago, accession 1909.159. PD-Art reproduction: Commons claims origin-country/life-plus-70-or-shorter public domain and treats the faithful two-dimensional reproduction as public domain in the United States. Source usage terms, via Wikimedia Commons. Source.