Sagot :

hirondelle52

Bonjour,

x= 3/2 +1

x= 3/2 + 2/2

x= 5/2

1+1 = 2x -x

2 =  x

x= 2

x/2 = 1

x = 1*2

x= 2

2x-2 - 8+4x = 3x-7

2x+ 4x -3x = -7 +2+8

3x = 3

x= 3/3

x= 1

x² +x +1 = x² -x +x -1

x² +x +1 = x²-1

x² -x² +x = -1 -1

x = -2

Vins

Réponse :

bonjour

x - 1 = 3/2

2 x/2 - 2/2 = 3/2

2 x = 3 + 2

2 x = 5

x = 5/2

x + 1 = 2 x - 1

x - 2 x = - 1 - 1

- x = - 2

x = 2

x/2 - 1 = 0

0.5 x = 1

x = 2

2 x - 2 - 8 + 4 x = 3 x - 7

6 x - 3 x = - 7 + 10

3 x = 3

x = 1

x² + x + 1 = ( x + 1 ) ( x - 1 )

x² + x + 1 = x² - 1

x² - x² + x  = - 1 - 1

x = - 2

Explications étape par étape :