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What is the additive inverse of 21i

User Juancentro
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3 votes

Answer:

The additive inverse of 21i is -21i

Explanation:

Let b be a real or complex number, the additive inverse of b is defined as a number x, such that:


b + x = 0

So, if we clear x from the equation, we get:


x = -b

Then the additive inverse of a number b is -b. In other words, the additive inverse of a number is the one that when you add it to the previous number the result is 0.

In this case we have a complex number.

Then:


b = 21i.

Where
i = √(-1)

So


21i + x = 0


x = -21i.

The additive inverse of 21i is -21i

User Sanket Singh
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