Quick answer
Complex numbers combine a real part and an imaginary part.
- Main formula
- z = a + bi, where i² = -1.
- Quick example
- The number 3 + 2i has real part 3 and imaginary part 2.
Definition
Complex numbers combine a real part and an imaginary part.
Main idea
z = a + bi, where i² = -1.
Example
The number 3 + 2i has real part 3 and imaginary part 2.
How to study it
Write the known values, identify the operation, substitute carefully and check the result with the inverse idea when possible.