Réponse :
bonjour
E = ( 4 x + 1 )² + ( 8 x + 2 )
E = ( 4 x + 1 ) ( 4 x + 1 ) + 2 ( 4 x + 1 )
E = ( 4 x + 1 ) ( 4 x + 1 + 2 )
E = ( 4 x + 1 ) ( 4 x + 3 )
F = x² + 2 x + 1 + 3 ( x + 1 )
F = 1 ( x + 1 )² + 3 ( x + 1 )
F = ( x + 1 ) ( x + 1 + 3 )
F = ( x + 1 ) ( x + 4 )
G = ( 2 - 3 x)² - 4 ( 2 - 3 x )
G = ( 2 - 3 x ) ( 2 - 3 x - 4 )
g = ( 2 - 3 x ) ( - 3 x - 2 )
H = 9 x² - 16 + 4 ( 3 x - 4 )²
H = 1 ( 3 x - 4 ) ( 3 x + 4 ) + 4 ( 3 x - 4 ) ( 3 x - 4 )
H = ( 3 x - 4 ) ( 3 x + 4 + 12 x - 16)
H = ( 3 x - 4 ) ( 15 x - 12 )
H = 3 ( 3 x - 4 ) ( 5 x - 4 )
7 x - 2 = 4 x + 1
7 x - 4 x = 1 + 2
3 x = 3
x = 1
15 x - 5 = 15 x - 6
15 x - 15 x = - 6 + 5
0 x = - 1
pas de solution
x/3 + x /4 = 5 + x / 2
4 x /12 + 3 x /12 = 60/12 + 6 x /12
7 x - 6 x = 60
x = 60
10 x + 5 = 3 x - 4
10 x - 3 x = - 4 - 5
7 x = - 9
x = - 9/7
(x + 2 )/ 6 + 2 x / 3 = 5
( x +2 ) / 6 + 4 x /6 = 30 /6
x + 2 + 4 x = 30
5 x = 30 - 2
5 x = 28
x = 28/5
( 2 x + 1 ) / 5 + 2 = 1 - ( 2 x - 3 ) / 3
( 6 x + 3 ) /15 + 30 /15 = 15/15 - ( 10 x - 15) / 15
6 x + 3 + 30 = 15 - 10 x + 15
6 x + 10 x = 15 + 15 - 3 - 30
16 x = - 3
x = - 3/16
