# Complex Conjugate

The complex conjugate of a complex number is the number obtained by flipping the sign of its imaginary part.

Complex conjugate is a high school-level concept that would be first encountered in a pre-calculus course covering complex numbers. It is listed in the California State Standards for Algebra II.

### Prerequisites

Complex Number: | A complex number is a number consisting of a real part and an imaginary part. A complex number is an element of the complex plane. |

Imaginary Number: | In mathematics, an imaginary number is multiple of the imaginary unit i (the square root of -1). |

### Classroom Articles on Complex Numbers

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