Is 3+\sqrt{5} a complex number?

2022-01-17 Answered
Is 3+5 a complex number?
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Answers (3)

nick1337
Answered 2022-01-17 Author has 510 answers

Step 1
Any number which can be expressed in the form of a+ib where a and b are real numbers and
i=1
is called a complex number.
3+5=(3+5)+i(0)
3+5
is a complex number with real part
3+5
and imaginary part 0.

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star233
Answered 2022-01-17 Author has 137 answers

Step 1
Complex number is a number of form a+ib where ‘a’ and ‘b’ are real numbers and
i=13+5
can also be written as
(3+5)+i(0)
Hence it is also a complex number which is purely real.

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alenahelenash
Answered 2022-01-24 Author has 343 answers
Yes, all real numbers are also complex numbers, with an imaginary part of zero. 3+5 is also an irrational number, since 5 is irrational.
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