The answer for (7+5i)+(-4+2i) is 3+7i. But I got -38-6i. I combined -28 and 10i^2 to get -38, and I combined -20i and 14i to get -6il So all together this was -28+-6i+-10, which resulted in -38-6i. Could you please tell me where I went wrong?

Answer 1

(7+5i)+(-4+2i)
The answer is for an addition.
You did a multiplication. Hope that explains it.

Answer 2

(7+5i) + (-4+2i)=> 7+5i-4+2i :.
7-4+5i+2i = 3 + 7i

Answer 3

Exactly! :)