Imaginary unit squared

The imaginary unit i is defined as the number whose square is negative one, which is the basis for building complex numbers. It is used whenever square roots of negative numbers or complex arithmetic appear.

\mathrm{i}^2 = -1

What the symbols mean

the imaginary unit, the square root of -1

About this formula

  • FieldMathematics
  • TopicComplex numbers
  • LevelHigh school
  • Also calledimaginary unit definition, i squared equals minus one, square root of negative one, complex number i, definition of i, i
  • SourceWikidata Q193796

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