Montrer que le triangle est rectangle quelle que soit la valeur de x.
A
3x + 9
B
5x + 15
4x + 12
Exercice 3 : /5
On donne l'expression: A = (3x −2)²+(4x+7)(3x-2)
1) Développer et réduire A.
2) Factoriser A.
3) Calculer A pour x = 0.
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