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WonderFxck
@WonderFxck
January 2021
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Bonsoir, j'ai l'exercice numéro 2 à faire pour demain, pourriez-vous m'aider ?
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lolamngy
Bonsoir :
L'exercice : 2
a. 4-2x(3x+5)
a. 4-2x×3x-2x×5
a. 4-6x²-10x
b. (-4×3x)(x×9)
b. (-12x)(9x)
b. -108x²
c. (3x+9)²
(3x+9)² il prend la forme de (a+b)² = a²+2ab+b²
Alors :
c. (3x)² + 2×3x×9 + 9²
c. 9x² + 54x + 81
C'est ton tour fait D
J’espère t'avoir t'aider
0 votes
Thanks 1
nini999
Verified answer
A = 4 - 2x x 3x + 2x x 5
A = 4 - 6x² + 10x
B = -12x x 9x
B = -108x
C = 3x² + 2 x 3x x 9 + 9²
C = 3x² + 54x + 9²
D = 7x x 4x + 7x x (-6) - 8 x 4x - 8 x (-6) + 10
D = 28x² -42x - 32x + 48 +10
D = 28x² - 74x + 58
0 votes
Thanks 1
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Bonsoir, j'ai besoins d'aide pour 2 exercices de maths merci de votre aide.
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L'exercice : 2
a. 4-2x(3x+5)
a. 4-2x×3x-2x×5
a. 4-6x²-10x
b. (-4×3x)(x×9)
b. (-12x)(9x)
b. -108x²
c. (3x+9)²
(3x+9)² il prend la forme de (a+b)² = a²+2ab+b²
Alors :
c. (3x)² + 2×3x×9 + 9²
c. 9x² + 54x + 81
C'est ton tour fait D
J’espère t'avoir t'aider
Verified answer
A = 4 - 2x x 3x + 2x x 5A = 4 - 6x² + 10x
B = -12x x 9x
B = -108x
C = 3x² + 2 x 3x x 9 + 9²
C = 3x² + 54x + 9²
D = 7x x 4x + 7x x (-6) - 8 x 4x - 8 x (-6) + 10
D = 28x² -42x - 32x + 48 +10
D = 28x² - 74x + 58