Bonsoir,
Résoudre les équations suivantes :
a. (2x - 5) (3x - 11) = 0
2x - 5 = 0 ou 3x - 11 = 0
2x = 5 3x = 11
x = 5/2 x = 11/3
b. 25x² - 144 = 0
(5x - 12) (5x + 12) = 0
5x - 12 = 0 ou 5x + 12 = 0
5x = 12 5x = - 12
x = 12/5 x = - 12/5
c. (x - 7)² = 36
(x - 7 - 6) (x - 7 + 6) = 0
(x - 13) (x - 1) = 0
x - 13 = 0 ou x - 1 = 0
x = 13 x = 1.