Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 3Contains Standard content
Complex Numbers, Quadratic Equations
The equation x squared plus 1 equals 0 has no real solution. Mathematicians did not give up: they invented a number i whose square is minus one, and a whole new world of numbers opened up. In this chapter you calculate with complex numbers, picture them as points on the Argand plane, find their modulus and conjugate, and solve every quadratic equation, even those with a negative discriminant. Python has complex numbers built in, so you can check every step.
3 courses
