Every real number is complex number.
If “a” is a real number then we wit write as
a+0i
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In the number system, a real number is a number having no imaginary part while a complex number is a number having the imaginary part.
A complex number is made of the real part and the imaginary part. A complex number is represented in the rectangular form as , where is the real part and is the imaginary part.
However, when , we have , which is a real number.
Therefore, we say that every real number can be expressed as a complex number with the imaginary part equal to 0.
Therefore, “every real number is a complex number”.