Bonjour
A = 2 x n + 2 x 7
A = 2n + 14
A = 2 (n + 7)
B = 2 x n + 5 x n
B = 2n + 5n
B = n (2 + 5)
C = 10 + n x 10
C = 10 + 10n
C = 10 (1 + n)
D = 9 x n - 15
D = 9n - 15
D = 3 (3n - 5)
E = n x 6 - 8 x n
E = 6n - 8n
E = 2n (3 - 4)
F = n x n - 5 x n
F = n² - 5n
F = n (n - 5)
G = 24n - 24
G = 24 (n - 1)
H = 12n x n + 2 x n
H = 12n² + 2n
H = 2n (6n + 1)
