The division of the complex number z by w ≠ 0, denoted z/w, is the complex number u that satisfies the equation z = w ⋅ u. In practice, division of complex numbers is not a guessing game, but...The division of the complex number z by w ≠ 0, denoted z/w, is the complex number u that satisfies the equation z = w ⋅ u. In practice, division of complex numbers is not a guessing game, but can be done by multiplying the top and bottom of the quotient by the conjugate of the bottom expression.