Which of the following is the real root and which is the non real root
X=2+-i
X=4

Question

Luigi0210 · Answer

A real root can also be described as a real number, i.e. 1, 2, 3, 4,...

Imaginary roots contain imaginary numbers, which include $\large \color{gold}{i} $, so something like 2i, 6i, 4i-2, 5i+2, etc..

Luigi0210 · Answer

and $\large \color{gold}{i} $ can be defined as $\large \color{gold}{i}=\sqrt{-1} $

Subshilava · Answer

@luigi0210 wrote:

and $\large \color{gold}{i} $ can be defined as $\large \color{gold}{i}=\sqrt{-1} $

Could you tell me what irrational vs rational roots are

Luigi0210 · Answer

Rational numbers/roots include a large range of numbers. They could be whole numbers (1,2,3,... etc), fractions (1/2, 1/4,..) repeating fractions (1/3, 2/3,...) and even decimals/repeating decimals (0.1, 0.2, 0.3333,... etc)

An irrational number/root is a number that CANNOT be turned into a simple fraction or into a fraction in general.