Bonsoir, quelle est l'ensemble solution de l'equation(2-x)(2x+1)= 2x+1 Merci.... Pergunta de ideia dePtitju18

April 2019 1 43 Report

Bonsoir, quelle est l'ensemble solution de l'equation(2-x)(2x+1)= 2x+1
Merci

MichaelS

(2-x)(2x+1) = 2x+1
(2-x)(2x+1) - (2x+1) = 0
(2x+1)(2-x-1) = 0
(2x+1)(-x+1) = 0

2x+1 = 0 ou -x+1 = 0
x = -1/2 ou x = -1

S = {-1 ; -1/2}

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