Complex numbers are numbers that can be expressed in the form a + bi, where a and b are real numbers, and i is an imaginary unit which is defined as the square root of -1. In this form, a is called the real part of the complex number, and bi is called the imaginary part.
Complex numbers are numbers of the form "a + bi", where "a" and "b" are real numbers, and "i" represents the imaginary unit. The imaginary unit "i" is defined as "i = √(-1)". In a complex number, "a" is called the real part, and "b" is called the imaginary part. Complex numbers can be added, subtracted, multiplied, and divided, just like real numbers. They are commonly used in various fields of mathematics, physics, and engineering.
