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The Complex Number i is NOT the square root of negative one! (TANTON Mathematics)
P. HISTORY OF ' AATHEMATICAL - School of Mathematics
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8.7 Example 3 Dividing Square Roots of Negative Numbers
Is the square root of a negative number defined? - Mathematics Stack Exchange
Complex numbers involve the square root of negative one, and most non-mathematicians find it hard to accept that such a number is meaningful. What's the best way to explain that complex numbers
Square roots cube_roots
Reflections and Tangents, Thoughts on Math, Education, and Technology
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