Réponse :
Explications étape par étape
Bonjour
A = 7 + 3(2x- 6)
A = 7 + 3 * 2x + 3 * (-6)
A = 7 + 6x - 18
A = 6x - 11
B = 8x + (2x - 2)(3x + 1)
B = 8x + 2x * 3x + 2x * 1 - 2 * 3x - 2 * 1
B = 8x + 6x^2 + 2x - 6x - 2
B = 6x^2 + 4x - 2
C = (3x * 5)(2 - 7x)
C = 15x(2 - 7x)
C = 15x * 2 + 15x * (-7x)
C = 30x - 105x^2
C = -105x^2 + 30x
D = 17 - (3 - x)(4x - 2)
D = 17 - (12x - 6 - 4x^2 + 2x)
D = 17 - 12x + 6 + 4x^2 - 2x
D = 4x^2 - 14x + 23
Développer et réduire :
a. A = 7 + 3 (2x - 6)
A = 6x + 7 - 18
b. B = 8x + (2x - 2) (3x + 1)
B = 8x + 6x² + 2x - 6x - 2
B = 6x² + 8x + 2x - 6x - 2
B = 6x² + 4x - 2
c. C = (3x * 5) (2 - 7x)
C = 15x * (2 - 7x)
C = 30x - 105x²
C = - 105x² + 30x
d. D = 17 - (3 - x) (4x - 2)
D = 17 - (12x - 6 - 4x² + 2x)
D = 17 - 12x + 6 + 4x² - 2x
D = 4x² - 12x - 2x + 17 + 6
D = 4x² - 14x + 23.
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Réponse :
Explications étape par étape
Bonjour
A = 7 + 3(2x- 6)
A = 7 + 3 * 2x + 3 * (-6)
A = 7 + 6x - 18
A = 6x - 11
B = 8x + (2x - 2)(3x + 1)
B = 8x + 2x * 3x + 2x * 1 - 2 * 3x - 2 * 1
B = 8x + 6x^2 + 2x - 6x - 2
B = 6x^2 + 4x - 2
C = (3x * 5)(2 - 7x)
C = 15x(2 - 7x)
C = 15x * 2 + 15x * (-7x)
C = 30x - 105x^2
C = -105x^2 + 30x
D = 17 - (3 - x)(4x - 2)
D = 17 - (12x - 6 - 4x^2 + 2x)
D = 17 - 12x + 6 + 4x^2 - 2x
D = 4x^2 - 14x + 23
Verified answer
Bonjour
Développer et réduire :
a. A = 7 + 3 (2x - 6)
A = 7 + 6x - 18
A = 6x + 7 - 18
A = 6x - 11
b. B = 8x + (2x - 2) (3x + 1)
B = 8x + 6x² + 2x - 6x - 2
B = 6x² + 8x + 2x - 6x - 2
B = 6x² + 4x - 2
c. C = (3x * 5) (2 - 7x)
C = 15x * (2 - 7x)
C = 30x - 105x²
C = - 105x² + 30x
d. D = 17 - (3 - x) (4x - 2)
D = 17 - (12x - 6 - 4x² + 2x)
D = 17 - 12x + 6 + 4x² - 2x
D = 4x² - 12x - 2x + 17 + 6
D = 4x² - 14x + 23.