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Exercice 9: Réduire les expressions suivantes E = 7x (x + 1) F = 3-(-x + 1) G = 5x - (-1-x) A = 9+ (x - 2) B = 3x - (x + 1) C=2+ (5-3x) - 1=2-(6-2x) J= -7x + (-5-4x) K = 2x (8 + 3x)
Exercice 9: Réduire les expressions suivantes E = 7x (x + 1) F = 3-(-x + 1) G = 5x - (-1-x) A = 9+ (x - 2) B = 3x - (x + 1) C=2+ (5-3x) - 1=2-(6-2x) J= -7x + (-5-4x) K = 2x (8 + 3x)
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Explications étape par étape:
E = 7x (x + 1)
= 7x^2 + 7x
F = 3 - (-x + 1)
= 3 + x - 1
= 2 + x
G = 5x - (-1 - x)
= 5x + x + 1
= 6x + 1
A = 9 + (x - 2)
= 9 + x - 2
= 7 + x
B = 3x - (x + 1)
= 3x - x - 1
= 2x - 1
C = 2 + (5 - 3x) - 1
= 2 + 5 - 3x - 1
= 6 - 3x
J = -7x + (-5 - 4x)
= -7x - 5 - 4x
= -11x - 5
K = 2x (8 + 3x)
= 16x + 6x^2