bonjour
D = 36 ab - 6 a + 42 ac
1 . D = 6 a ( 6 b - 1 + 7 c )
e = 7 d + 14 e - 84
E = 7 ( d + 2 e - 12 )
2 ) a = 5 , b = 1.5 et c = 2
D = 36 ab - 6 a + 42 ac
= 36 *5*1.5 - 6 *5 + 42*5 * 2
= 270 - 30 + 420
= 660
tu fais pareil pour E
a = 6 x + 18 + 7 x - 5 - 4 x - 10
A = 9 x + 3
A = 3 ( 3 x + 1 )
F = 2 x + 6 + 4 x - 4
f = 6 x + 2
F = 2 ( 3 x + 1 )
G = 6 x + 3 + 9 = 6 x + 12
G = 6 ( x + 2 )
