Complex number — Algebra II, what it means and where it is taught
Anything of the form a + bi, with a the real part and b the imaginary part.
Taught in Algebra II.
Where it is taught
What uses it later
This idea is needed for:
- Modulus — The distance r, also written |z| for a complex number.
Practise this idea
1 question in the course bank use Complex number, in Polar Coordinates.
Problem 1
Find |z| for the complex number z = 8 - 6i.
Worked answer
10
√64+36 = 10