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3. In the complex number system, which of the following is equivalent to
(3-21)?
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3 of 3
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Answer 1

The expression (3-21) in the complex number system is equivalent to -18.

Step-by-step explanation:

In the complex number system, the expression (3-21) can be simplified by combining like terms. When we subtract 21 from 3, we get -18 as the result. Thus, (3-21) is equivalent to -18.

Learn more about Simplifying expressions in the complex number system