Bonjour,
Calculer la valeur de l'expression A pour x = 2:
A = 5x - 2(3x + 5)
A = 5*2 - 2(3*2 + 5)
A = 10 - 2(6 + 5)
A = 10 - 2*11
A = 10 - 22
A = -12
Réduire les expressions:
B = 4*5x
B = 20x
C = 7x - 9x
C = -2x
D = 5x - 4 + 7x - 8x + 6
D = 5x + 7x - 8x - 4 + 6
D = 4x + 2
E = -4y + 5 - 2y² + y - 8y² - 3y - 11
E = -2y² - 8y² - 4y + y - 3y + 5 - 11
E = -10y² - 6y - 6
F = 4a + 2b - 7 - 3a + 8
F = 4a - 3a + 2b - 7 + 8
F = a + 2b + 1
* = multiplication
Bonne journée.
