Bonjour Pouvez-vous m'aider à cet exercice s'il vous plaît
Question
1 Réponse
-
1. Réponse maudmarine
Bonjour,
(x + 7) (x - 4) = 0
x + 7 = 0 ou x - 4 = 0
x = - 7 x = 4
(3x + 9) (5x - 25) = 0
3x + 9 = 0 ou 5x - 25 = 0
3x = - 9 5x = 25
x = - 9/3 x = 25/5
x = - 3 x = 5
(- 2x + 4) (3 - 9x) = 0
- 2x + 4 = 0 ou 3 - 9x = 0
- 2x = - 4 - 9x = - 3
x = 4/2 x = 3/9
x = 2 x = 1/3
(x + 1) (- 2x - 2) = 0
x + 1 = 0 ou - 2x - 2 = 0
x = - 1 - 2x = 2
x = - 2/2
x = - 1
(14x + 38) (12x - 39) = 0
14x + 38 = 0 ou 12x - 39 = 0
14x = - 38 12x = 39
x = - 38/14 x = 39/12
x = - 19/7 x = 3,25
(x - 1) (x - 2) (x - 3) = 0
x - 1 = 0 ou x - 2 = 0 ou x - 3 = 0
x = 1 x = 2 x = 3.