Question

Divide 4 - 5i/1 + 4i

Answer is -16/17,-21/17i

Answer 1

hmmm there is only one answer
multiply by 1-4i numerator and denominator
the numerator will become (4-5i)(1-4i) = 4-16i-5i-20 = -21i-16
and the denominator will become (1+4i)(1-4i) = 17
so the answer is (-21i-16)/17

Answer 2

multiply by 1-4i both numerator and denominator *