January 2021 0 55 Report
Bonsoir, Forme canonique (2nd degré) :

a) x² - x - 6 = 0
(x - 1/2)² - 1/4 - 6 = 0
(x - 1/2)² - 25/4 = 0

Je comprends pas le 25/4...

S'il vous plaît
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