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Sagot :

Réponse :

Explications étape par étape

Bonsoir

7x - 1 = 4(3x + 4)

7x - 1 = 12x + 16

12x - 7x = -1 - 16

5x = -17

x = -17/5

4x + 7 + 2x = 5x - 8 - 2x

6x + 7 = 3x - 8

6x - 3x = -7 - 8

3x = -15

x = -15/3

x = -5

7x + 3 = -4 + 7(x + 1)

7x + 3 = -4 + 7x + 7

7x - 7x = 3 - 3

0 = 0

Quelque soit x toutes les solutions sont possibles

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

2x - 2 = 2x + 3

2x - 2x = 3 + 5

0 = 8

Aucune solution possible car 0 # 8

(2 + 3x)(6x - 1) = 0

2 + 3x = 0 ou 6x - 1 = 0

3x = -2 ou 6x = 1

x = -2/3 ou x = 1/6

Soit F = (x + 3)^2 - (x + 3)(2x - 1) factoriser F puis résoudre F = 0

F = (x + 3)(x + 3 - 2x + 1)

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

x + 3 = 0 ou -x + 4 = 0

x = -3 ou x = 4

Developper puis résoudre :

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

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

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

10x = -5

x = -5/10

x = -1/2

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