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  2. Imaginary unit - Wikipedia

    en.wikipedia.org/wiki/Imaginary_unit

    The imaginary unit i in the complex plane: Real numbers are conventionally drawn on the horizontal axis, and imaginary numbers on the vertical axis. The imaginary unit or unit imaginary number (i) is a solution to the quadratic equation x2 + 1 = 0. Although there is no real number with this property, i can be used to extend the real numbers to ...

  3. Big Brain Academy - Wikipedia

    en.wikipedia.org/wiki/Big_Brain_Academy

    Big Brain Academy: Brain vs. Brain. December 3, 2021. Big Brain Academy is a series of puzzle video games developed and published by Nintendo. Similar to the Brain Age series, each game features a number of activities designed to test, measure, and improve the player's mental skills. [1] The first two games were released under the Touch!

  4. Imaginary number - Wikipedia

    en.wikipedia.org/wiki/Imaginary_number

    Imaginary number. An imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i2 = −1. [1][2] The square of an imaginary number bi is −b2. For example, 5i is an imaginary number, and its square is −25. The number zero is considered to be both real and imaginary.

  5. Big Ideas Learning - Wikipedia

    en.wikipedia.org/wiki/Big_Ideas_Learning

    www.BigIdeasLearning.com. Big Ideas Learning, LLC is an educational publisher in the United States. The company's headquarters is located in Erie, Pennsylvania. It publishes mathematics textbooks and instructional technology materials. Big Ideas Learning is a privately owned Limited liability company. [1]

  6. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    Complex number. A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the "imaginary unit", that satisfies i2 = −1. In mathematics, a complex number is an element of a number system ...

  7. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    Mathematics is a field of study that discovers and organizes methods, theories and theorems that are developed and proved for the needs of empirical sciences and mathematics itself. There are many areas of mathematics, which include number theory (the study of numbers), algebra (the study of formulas and related structures), geometry (the study ...

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