January 2021 0 66 Report
Bonsoir, on développe a l'intérieur d'un parenthèse placé derrière le "-" ; puis on supprime les parenthèses A = 4x"au carré" - (5x - 3) (1+ 6x)
C = 2x - (1-5x) - (4x-3) (1-x)
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