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Which of the following is a complex number? A. -7 B. 2+ square root of 3 C. 4+9i D. pi

Which of the following is a complex number? A. -7 B. 2+ square root of 3 C. 4+9i D. pi
asked 20.9k views
4 votes
Which of the following is a complex number?

A. -7
B. 2+ square root of 3
C. 4+9i
D. pi

asked
User Steve Chaloner
by
8.1k points

2 Answers

2 votes
A complex number has a real part and an imaginary part. The standard form is a + bi, where a is the real part and bi is the imaginary part.
The only choice here that fits that criteria is letter C.
answered
User Dogiordano
by
7.3k points
5 votes
The answer is: C, 4+9i
answered
User Asgu
by
8.5k points
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