Common Core
N-CN.A.2
3 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Algebra 2 · Chapter 2 · Lesson 1
What happens when the discriminant is negative.
Algebra 2 · Chapter 2 · Lesson 2
Arithmetic with Complex Numbers
Treat i like a letter, then replace i squared.
Integrated Math 2 · Chapter 3 · Lesson 2
Arithmetic With Complex Numbers
Treat i like a variable, then simplify.