Question:
Solve that equation |z| = z + 1 + 2i.
Solution:
According to the question,
We have,
|z| = z + 1 + 2i
Substituting z = x + iy, we get,
⇒ |x + iy| = x + iy + 1 + 2i
We know that,
|z| = √(x2 + y2)
√(x2 + y2) = (x + 1) + i(y + 2)
Comparing real and imaginary parts,
We get,
√(x2 + y2) = (x + 1)
And 0 = y + 2
⇒ y = -2
Substituting the value of y in √(x2 + y2) = (x + 1),
We get,
⇒ x2 + (-2)2 = (x + 1)2
⇒ x2 + 4 = x2 + 2x + 1
Hence, x = 3/2
Hence, z = x + iy
= 3/2 – 2i