Complex numbers and complex planes  Complex Numbers
Complex numbers and complex planes
Now that we know the basics of imaginary numbers, let's expand our knowledge and learn about another concept that is closely tied to imaginary numbers – complex numbers, a number that is consisted of a real part, and an imaginary part. In this section, we will learn what makes up a complex number, as well as how to plot on a complex plane.
Basic concepts:
 Evaluating and simplifying radicals
 Solving quadratic equations using the quadratic formula
 Nature of roots of quadratic equations: The discriminant
Related concepts:
 Imaginary zeros of polynomials
Lessons

2.
For the following quadratic equations,
i) find and classify the roots
ii) plot the roots on the complex plane