Exercice 1 : Développer chaque expression B = 4(1 - 7y) + (4y - 5)(y - 1) C = 3t(t + 1) + (5+ t)(t - 2) D = (4k - 1)(9 + k) - 9k(10 - 3k) E = (m + 2)(8 + 3m) -
Mathématiques
Donia2002
Question
Exercice 1 : Développer chaque expression
B = 4(1 - 7y) + (4y - 5)(y - 1)
C = 3t(t + 1) + (5+ t)(t - 2)
D = (4k - 1)(9 + k) - 9k(10 - 3k)
E = (m + 2)(8 + 3m) - 2(1 - m)(m - 7)
Exercice 2 : Factoriser chaque expression
E = 10x² - 5x + 15
F = 4x² + 7x
G = 9x²(x + 1) + 6x(5 + x)
H = (11x - 3)² + (11x - 3)(5 + 9x)
1 Réponse
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1. Réponse Maaryse
exercice 1 :
B = 4(1 - 7y) + (4y - 5)(y - 1)
B = 4 - 28y + 4y² - 4y - 5y + 5
B = 4y² - 27y + 9
C = 3t(t + 1) + (5+ t)(t - 2)
C = 3t² + 3 + 5t - 10 + t² - 2t
C = 4t² + 3t - 7
D = (4k - 1)(9 + k) - 9k(10 - 3k)
D = 36k + 4k² - 9 - k -90k + 27k²
D = 31k² - 55k - 9
E = (m + 2)(8 + 3m) - 2(1 - m)(m - 7)
E = 8m + 3m² + 16 + 6m -2 (1m - 7 - m² + 7m)
E = 26m + 5m² + 30