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Niccolò Fontana Tartaglia

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Find the distance from 0 on the complex plane by...

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An **imaginary number** is a real number multiplied by the imaginary unit i, which is defined by its property *i*^{2} = −1. The square of an imaginary number bi is −*b*^{2}. For example, 5*i* is an imaginary number, and its square is −25. By definition, zero is considered to be both real and imaginary.