Hello, samdmansam!

We have: .Find the Cartesianinequalityfor the region represented by:

Write your answer in a "natural" form.

What is the centre of that circle?

What is the radius of the circle?

We are given two points on the complex plane: .

We want all points such that: .

. .

We have: .

. . which simplifies to: .

Now complete the square to find the center and radius of this circle.

. . We want all points on and inside the circle.

Good luck!