Bonjour,
x(x - 2) = x(5 - 2x)
x² - 2x - 5x + 2x² = 0
3x² - 7x = 0
x (3x - 7) = 0
x = 0
3x - 7 = 0
x = 7/3
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(x - 1) (2x-3) = (x-1) (x-5)
(x - 1) (2x-3) - (x-1) (x-5)
(x - 1) × (2x - 3 - (x - 5)) = 0
(x-1) × (2x - 3 - x + 5) = 0
(x - 1) × (x + 2) = 0
x - 1 = 0
x = 1
x + 2 = 0
x = -2
En espérant t'avoir aidé(e) ^^