z = 50 / (3+4i). What is z in a+bi form?
Multiply by complex conjugate
z = 50 / (3+4i) * (3-4i) / (3-4i)
Rationalise
z = 50 ( 3 - 4i) / 25 = 6 - 8i.
IM
Answered by Ignacio M. • Further Mathematics tutor
7964 Views
See similar Further Mathematics A Level tutorsRelated Further Mathematics A Level answers
All answers ▸Given that the equation x^2 - 2x + 2 = 0 has roots A and B, find the values A + B, and A * B.
How to multiply and divide by complex numbers
Given the equation x^3-12x^2+ax-48=0 has roots p, 2p and 3p, find p and a.
The point D has polar coordinates ( 6, 3π/4). Find the Cartesian coordinates of D.