4xy - 12x - 7y + 21
4xy - 12x - 7y + 21 = 4x(y - 3) - 7(y - 3)4x(y - 3) - 7(y - 3) = (4x - 7)(y - 3)
Отговор: (4x - 7)(y - 3)
4xy - 12x - 7y + 21
4xy - 12x - 7y + 21 = 4x(y - 3) - 7(y - 3)
4x(y - 3) - 7(y - 3) = (4x - 7)(y - 3)
Отговор: (4x - 7)(y - 3)