## imaginary numberA number whose square is negative. Every imaginary number can be written in the form ib where b is a real
number and i is the imaginary unit
with the property that i^{ 2} = -1. For example, √-16
is an imaginary number, since √-16 = √-1.√16 can be written
as 4i. Imaginary numbers are complex numbers in which the real part is zero. The term "imaginary" is unfortunate because it suggests something that has less reality than a "real" number, which isn't the case. ## Related category• COMPLEX NUMBERS | |||||

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