given two complex numbers \( w = a + ib \) and \( z = A + iB \):
multiply numerator and denominator by the conjugate of the denominator \((A - iB)\):
expand numerator and denominator:
write in standard form \(x + iy\):
real part \(\dfrac{aA+bB}{A^2+B^2} \quad \) , imaginary part \(\dfrac{bA-aB}{A^2+B^2}\).
conjugate method: multiply numerator & denominator by \(A-iB\)