What is the additive inverse of the complex number 9 – 4i?

The additive inverse of a number is the value that adds to it to make 0. Negate both parts of 9 – 4i: the inverse is –9 + 4i, since (9 – 4i) + (–9 + 4i) = 0. The correct choice is –9 + 4i.

AI-written and checked against the verified answer.