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AlisonRomero703
@AlisonRomero703
May 2019
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Bonjour est ce que quelqu'un pourrait m'aider a resoudre cette exercice Mathématiques 3eme Ex1 - Soit A = (3x + 1) (x - 3)-(x - 3)2 1) Développer et réduire 2)calculer les valeurs de A pour x = -2 et x =3 3)Factoriser A
S'il vous plaît merci
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rosiemuller2000
Verified answer
Coucou
1 A = (3x + 1) (x - 3)-(x - 3)²
A = 3x² -9x +x -3 -x² + 6x -9
A= 2x² -2x -12
2) x=-2
A = 2 * (-2)² -2 *-2 -12
A = 2*4 +4 -12
A = 0
x = 3
A= 2*3² -2*3 -12
A = 2*9 -6 -12
A = 0
3) A = (3x + 1) (x - 3)-(x - 3)²
A = (x-3)(3x+1-x+3)
A=(x-3)(2x+4)
voila j espere t avoir aider
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Verified answer
Coucou1 A = (3x + 1) (x - 3)-(x - 3)²
A = 3x² -9x +x -3 -x² + 6x -9
A= 2x² -2x -12
2) x=-2
A = 2 * (-2)² -2 *-2 -12
A = 2*4 +4 -12
A = 0
x = 3
A= 2*3² -2*3 -12
A = 2*9 -6 -12
A = 0
3) A = (3x + 1) (x - 3)-(x - 3)²
A = (x-3)(3x+1-x+3)
A=(x-3)(2x+4)
voila j espere t avoir aider