Lesson 87 of 95

Advanced Imaginary Numbers
Students learn to solve equations using the imaginary number "i". For example, to solve x^2 + 21 = 1, first subtract 21 from both sides to get x^2 = -20. Next, take the square root of both sides to get x = plus or minus root -20. Next, think of root -20 as root -1 times root 20, which  more...
Start Now to get your Online Math Help lessons from Your Teacher math tutors

Elementary / Middle
High School Math

Community College
College Math

*Also referred to as Elementary Algebra or Beginning Algebra.
Homeschoolers click here!