Sagot :
Question 4: 0
Question 5: (x+2)(x-3) = 0
Question 6: -1 et 4
Question 7: 3 et -2/7
Question 8: -5 et 5
Question 5: (x+2)(x-3) = 0
Question 6: -1 et 4
Question 7: 3 et -2/7
Question 8: -5 et 5
bonjour
2 x ( 4 x - 3 ) = 0
soit 2 x = 0 et x = 0
soit 4 x - 3 = 0 et x = 3/4
- 2 est une solution de ( x + 2 ) ( x - 3 ) = 0
6 ) ( 3 x + 3 ) ( 2 x - 8 ) = 0
solutions = - 3 /3 = - 1 et 8/2 = 4 donc - 1 et 4
7 ) ( x - 3 ) ( 7 x + 2 ) = 0
solutions = 3 et - 7/2
8 ) 4 x² = 100
x² = √ 25 ou - √25 donc solution = 5 et - 5