Bonjour,
1)
A = 3 (a - 2)
A = 3a - 6
B = 4 (2x + 1) + 3x - 2
B = 8x + 4 + 3x - 2
B = 11x + 2
C = x (x + 5) + 6 - 2x
C = x² + 5x + 6 - 2x
C = x² + 3x + 6
D = 7a + a (3b + a²)
D = 7a + 3ab + a³
D = a³ + 7a + 3ab.
2)
1-
Choisir un nombre
n
Ajouter 3
n + 3
Multiplier par 4
(n + 3) * 4 = 4n + 12
2-
4n + 12 = 4 * 5 + 12 = 20 + 12 = 32.
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Bonjour,
1)
A = 3 (a - 2)
A = 3a - 6
B = 4 (2x + 1) + 3x - 2
B = 8x + 4 + 3x - 2
B = 11x + 2
C = x (x + 5) + 6 - 2x
C = x² + 5x + 6 - 2x
C = x² + 3x + 6
D = 7a + a (3b + a²)
D = 7a + 3ab + a³
D = a³ + 7a + 3ab.
2)
1-
Choisir un nombre
n
Ajouter 3
n + 3
Multiplier par 4
(n + 3) * 4 = 4n + 12
2-
4n + 12 = 4 * 5 + 12 = 20 + 12 = 32.