Question

What is the value of (–7 + 3i) – (2 – 6i)?

–9 + 9i
–9 – 3i
–5 – 3i
–5 + 9i

(-7 + 3i) - (2 - 6i) = -7 + 3i - 2 + 6i = (-7 + (-2)) + (3i + 6i) = -9 + 9i

This is how I worked it out^ Was I correct?

Answer 1

The answer is correct. If you have a graphing calculator, there is an "i" button, so the calculator does all your work for you and is a good way to check your answers.

Answer 2

-9+9i is in fact correct so A is right
:)