What is the additive inverse of 21i

The additive inverse of 21i is -21i

Step-by-step explanation:

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

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

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:

.

Where

So

.

The additive inverse of 21i is -21i

i dont have an answer

step-by-step explanation: