Bonjour pouvez vous maidez pour les exo 1 et 2 je vous remercie d'avance.... Pergunta de ideia deDaprincessecool

Daprincessecool @Daprincessecool

June 2021 1 98 Report

Bonjour pouvez vous maidez pour les exo 1 et 2 je vous remercie d'avance

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winner123

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Bonsoir

A = 3x(1 -2x) - (2x +1)²
A = 3x - 6x² - ( 4x² + 4x +1)
A = 3x - 6x² -4x² -4x -1
A = - 10x² -x -1

3x +5 = 7x - 2
3x -7x = -2 -5
-4x = -7
x = 7/4

I = (2√3 +2)(√3 -2)
I = 2√9 - 4√3 +2√3 -4
I = 6 -4√3 +2√3 -4 = -2√3 +2

J = (√3 -1)² -2
J = 3 - 2√3 + 1 -2 = -2√3 +2

cadet = x
2ème = x +100
ainé = x +100 +200
x +x +100 + x +100 +200 = 1 600
3x + 400 = 1 600
3x = 1 600 -400
3x = 1 200
x = 400
le cadet reçoit 400 €

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