Let z=x+yi such that 16=5z - 3z*, What is z?

z* is the complex conjugate of z therefore z* = x - yi. So 16 + 32i = 5(x + yi)-3(x - yi), real: 16 = 5x - 3x => 16=2x => x=8, imaginary: 32 = 5y + 3y => 32 = 8y => y=4, therefore z = 8 + 4i.

BC

Related Maths A Level answers

All answers ▸

dh/dt = (6-h)/20. When t=0, h=1. Show that t=20ln(5/(6-h))


How do you integrate the equation x^2 + 4x + 3 dx? (


Find the area contained under the curve y =3x^2 - x^3 between 0 and 3


Find the gradient of the tangent to the line y=(x-2)^2 at the point that it intercepts the y-axis