bonjour
A = 2 x n + 2 x 7 = 2 (n + 7)
B = 2 x n + 5 x n = n (2+5)
C = 10 x 1 + n x 10 = 10 (1 + n)
D = 9xn - 15 = 3 x 3n - 3 x 5 = 3 (3n-5)
E = nx6 - nx8 = 2n x 3 - 2n x 4 = 2n(3-4)
F=nxn - 5xn = n(n-5)
G=24 x n - 24x1 = 24(n-1)
et H = 2n x 6n + 2n x 1 = 2n (6n+1)