Hey !
Factoriser en détaillant.
C = 3x²y + 6xy² - xy
C = xy * 3x + xy * 6y - xy * 1
C = xy(3x + 6y - 1)
F = 5x(2x - 3) - (4x - 6)(x + 1)
F = 5x(2x - 3) - 2(2x - 3)(x + 1)
F = (2x - 3)[(5x - 2(x + 1)]
F = (2x - 3)(5x - 2x - 1)
F = (2x - 3)(3x - 2)
Bonne journée.
