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Which of the following is a complex number?

Which of the following is a complex number?-example-1
User HoelR
by
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1 Answer

5 votes

Answer:

The complex number is B,
3\sqrt{(7)/(5)}+\sqrt{-(9)/(5)}

Explanation:

A complex number should be written in the form
a+bi, where a and b are real numbers, and i is an imaginary number.

Recall that
√(-1)=i. Since letter B has the second term
\sqrt{-(9)/(5)}, we can say


\sqrt{-(9)/(5)}=\sqrt{-1\cdot(9)/(5)}=i\sqrt{(9)/(5)}

Therefore, the number can be written as


3\sqrt{(7)/(5)}+i\sqrt{(9)/(5)}.

User RyuuGan
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