If $u = 2 + 3i$ and $v = -5 + 4i$, then $u + v =$?

Question

I have an exercise, it says:

If $u = 2 + 3i$ and $v = -5 + 4i$, then $u + v =$ ?

My answer: $$u + v = (2 - 5) + (3 + 4)i = -3 + 7i$$ but the correct answer is $7 - 3i$.

What is wrong with my solution?

Answer 1

We sum real and imaginary parts thus

$$2+3i-5+4i = -3+7i$$

There must be a typo in your study material.