Complex conjugate

[d2d13]

Can anyone tell me who was the first ever mathematitian to use the term "conjugate" in relation to complex numbers? I don't seem to find it anywhere

[ed van der meulen]

CONJUGATE. Augustin-Louis Cauchy (1789-1857) used conjuguées for a + bi and a - bi in Cours d'Analyse algébrique (1821, p. 180) (Smith vol. 2, page 267).

CONJUGATE ANGLE appears in the Century Dictionary (1889-1897).

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ed