Exer. 3348: Find the sum.

Chapter 2: Polynomials and rational Functions 2.4 Complex Numbers All complex derive from trying to factorise x +1 which gives x = −1 . Before we √ would say that it didn’t have an answer but from this comes a whole new branch of mathematics which are complex numbers and they define i = √−1 as the imaginary unit for complex numbers or i = 1. Complex numbers are in the form of a + bi where a and b are real numbers. In a+ bi a is the real part of the complex number and b is the imaginary part. If a = 0 then the number is a pure imaginary number and if b = 0 then the number is a rela number. For example: 2 + 5i = Complex number 7i = Pure imaginary 2 = Real number Operations in complex