How Is 5 A Complex Number? Complex Numbers A complex number is a number of the form a + bi, where i = and a and b are real numbers. For example, 5 + 3i, – + 4i, 4.2 – 12i, and – – i are all complex numbers. a is called the real part
What Is Imaginary Number Equal To? Complex numbers have real and imaginary components, and can be used in operations similar to real numbers. What Are Imaginary Numbers? The imaginary number i is equal to the square root of -1. In other words, i2 equals -1. The square root of a negative number is not a