Bonjours j aurais besoin d aide pour résoudre ces équations svp x + 1.5 = 0 3/4 + x) = 0 3x + 1 = 2(x-3) 3+ 4(x - 2) - 2x(4 + 2) = 0 7(x + 1) + 3(3 - x) =5(1 -

Réponse :

bonjour

x + 1.5 = 0

x = - 1.5

3/4 + x  = 0

x = - 3/4

3x + 1 = 2(x-3)

3 x + 1 = 2 x  - 6

3 x - 2 x = - 6 - 1

x = - 7

3+ 4(x - 2) - 2x(4 + 2) = 0

3 + 4 x - 6 -  8 x - 8 = 0

- 4 x = - 3 + 6 + 8

- 4 x =  11

x = - 11/4

7(x + 1) + 3(3 - x) =5(1 - x) - 3(2x + 1)

7 x + 1 + 9 - 3 x = 5 - 5 x - 6 x - 3

4 x + 11 x = 5 - 3 - 1 - 9

15 x = - 8

x = - 8/15

x + 4(x + 2) - 3 (3 + 2x) = 4x + 2

x + 4 x + 8 - 9 - 6 x = 4 x + 2

- x - 4 x = 2 - 8 + 9

- 5 x =  3

x = - 3/5

2x(x + 1) + 3 = (2x + 2)(x - 3)​

2 x² + 2 x + 3 = 2 x² - 6 x + 2 x - 6

2 x² - 2 x² + 2 x + 6 x - 2 x = - 6 - 3

6 x = - 9

x = - 9/6 = - 3/2

Explications étape par étape