What are complex numbers?

Complex numbers are numbers that consist of both a real part and an imaginary part. They are usually expressed in the form a + bi, where "a" represents the real part and "bi" represents the imaginary part. The imaginary part is a multiple of the imaginary unit, denoted as "i," which is defined as the square root of -1. Complex numbers are used in various areas of mathematics and engineering, including algebra, calculus, and physics.

Complex numbers are numbers that consist of both a real part and an imaginary part. They are written in the form a + bi, where "a" represents the real part, "b" represents the imaginary part, and "i" represents the imaginary unit, which is defined as the square root of -1. The real part represents the vertical axis on a complex plane, while the imaginary part represents the horizontal axis. Complex numbers are used in various branches of mathematics and physics, such as calculus, electrical engineering, and quantum mechanics.