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Résoudre les équations suivantes:
2x + 3 = 0
5x + 10 = 2(x-3)
8x + 12 = 25
(3x + 5)(4x - 2) = 0


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2x + 3 = 0

2x = -3

x = -3/2

 

 

5x + 10 = 2(x-3)

5x + 10 = 2x - 6

5x - 2x = -10 - 6

3x = - 16

x = -16/3

 

 

8x + 12 = 25

8x = 25 - 12

8x = 13

x = 13/8

 

(3x+5)(4x-2) = 0

3x + 5 = 0                 4x -2 = 0

3x = -5                       4x = 2

x = -5/3                      x = 4/2

x= -5/3                                  x = 2