ALGEBRA 2
Lesson 87 of 95

IMAGINARY NUMBERS
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...
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