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May 2019
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Bonsoir pouvez vous m'aider pour mon DM svp.
Développer et réduire les expressions suivantes:
A= (x+4)(y+7)
B= (x-5)(x-4)
C= (3x+6)au carré
D= (5x+2)(x+7)+(3x-7)(3x+7)
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blondinetteoceane88
Verified answer
Bonsoir
A=(x+4)(y+7)
A=xy+7x+4y+28
B=(x-5)(x-4)
B=x²-4x-5x+20
B=x²-9x+20
C=(3x+6)²
C=9x²+36x+36
D=(5x+2)(x+7)+(3x-7)(3x+7)
D=5x²+35x+2x+14+9x²+21x-21x-49
D=14x²+37x-35
1 votes
Thanks 0
base
Merci beaucoup mais pour la C il faut réduire d'abord on fais comment
blondinetteoceane88
De rien pour la c c'est l'identité remarquable (a+b)² ce qui donne a²+2ab+b² quand tu développes
base
D'accord Merci
nguyenso9
Bonsoir,
A = (x + 4) (y + 7)
A = xy + 7x + 4y + 28
B = (x - 5) (x - 4)
B = x² - 4x - 5x + 20
B = x² - 9x + 20
C = (3x + 6)²
C = 9x² + 36x + 36
D = (5x + 2) (x + 7) + (3x - 7) (3x + 7)
D = 5x² + 35x + 2x + 14 + 9x² - 49
D = 9x² + 5x² + 35x + 2x + 14 - 49
D = 14x² + 37x - 35
Bonne soiree
1 votes
Thanks 0
base
Merci
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Lista de comentários
Verified answer
BonsoirA=(x+4)(y+7)
A=xy+7x+4y+28
B=(x-5)(x-4)
B=x²-4x-5x+20
B=x²-9x+20
C=(3x+6)²
C=9x²+36x+36
D=(5x+2)(x+7)+(3x-7)(3x+7)
D=5x²+35x+2x+14+9x²+21x-21x-49
D=14x²+37x-35
A = (x + 4) (y + 7)
A = xy + 7x + 4y + 28
B = (x - 5) (x - 4)
B = x² - 4x - 5x + 20
B = x² - 9x + 20
C = (3x + 6)²
C = 9x² + 36x + 36
D = (5x + 2) (x + 7) + (3x - 7) (3x + 7)
D = 5x² + 35x + 2x + 14 + 9x² - 49
D = 9x² + 5x² + 35x + 2x + 14 - 49
D = 14x² + 37x - 35
Bonne soiree