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Can someone explain why the square root of -4 equals "2i"? what is i?
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May 1, 2018
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Can someone explain why the square root of -4 equals "2i"? what is i?
Mathematics
high-school
Frangossauro
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"i" is an imaginary unit that when squared is equal to -1. (as there is no real value that this would be possible, thus the creation of the imaginary unit i)
So the square root of -4, √-4=±2i
Erwin Van Hoof
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May 2, 2018
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Erwin Van Hoof
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i means that it's an imaginary number, because in finding square roots technically you cant have negative numbers. so instead of saying -2 you say 2i
hope that helps!
JoJo
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May 5, 2018
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