Exercices de développements A = 5(x - 1)-3(x + 1) - (2x + 3) B = (x + 1)(4 - x) + 2x(x - 3) C = (2 - x)(5x - 1)-(3x + 4)(1 - x) D = (3 - 2x + x²)(x - 1 + x2) E
Question
A = 5(x - 1)-3(x + 1) - (2x + 3)
B = (x + 1)(4 - x) + 2x(x - 3)
C = (2 - x)(5x - 1)-(3x + 4)(1 - x)
D = (3 - 2x + x²)(x - 1 + x2)
E = (3x - 1)(x + 2) + (1 - 2x)(x + 5)
F = (3x - 1)(x + 2)(5 - x)
G = (2 - x)(5x - 1)-(3x + 4)(1 - x)
Merci de me répondre au plus vite
1 Réponse
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1. Réponse maudmarine
Bonjour
Développement :
A = 5(x - 1)-3(x + 1) - (2x + 3)
A = 5x - 5 - 3x - 3 - 2x - 3
A = 5x - 3x - 2x - 5 - 3 - 3
A = - 11.
B = (x + 1)(4 - x) + 2x(x - 3)
B = 4x - x² + 4 - x + 2x² - 6x
B = - x² + 2x² + 4x - 6x - x + 4
B = x² - 3x + 4
C = (2 - x)(5x - 1)-(3x + 4)(1 - x)
C = 10x - 2 - 5x² + x - (3x - 3x² + 4 - 4x)
C = 10x - 2 - 5x² + x - 3x + 3x² - 4 + 4x
C = - 5x² + 3x² + 10x + x + 4x - 3x - 2 - 4
C = - 2x² + 12x - 6
D = (3 - 2x + x²)(x - 1 + x²)
D = 3x - 3 + 3x² - 2x² + 2x - 2x³ + x³ - x² + x⁴
D = x⁴ - 2x³ + x³ + 3x² - 2x² - x² + 3x + 2x - 3
D = x⁴ - x³ + 5x - 3
E = (3x - 1)(x + 2) + (1 - 2x)(x + 5)
E = 3x² + 6x - x - 2 + x + 5 - 2x² - 10x
E = 3x² - 2x² + 6x - x + x - 10x - 2 + 5
E = x² - 4x + 3
F = (3x - 1)(x + 2)(5 - x)
F = (3x² + 6x - x - 2) (5 - x)
F = 15x² - 3x³ + 30x - 6x² - 5x + x² - 10 + 2x
F = - 3x³ + 15x² + x² - 6x² + 30x + 2x - 5x - 10
F = - 3x³ + 10x² + 27x - 10
G = (2 - x)(5x - 1)-(3x + 4)(1 - x)
G = 10x - 2 - 5x² + x - (3x - 3x² + 4 - 4x)
G = 10x - 2 - 5x² + x - 3x + 3x² - 4 + 4x
G = - 5x² + 3x² + 10x + x + 4x - 3x - 2 - 4
G = - 2x² + 12x - 6