
### Instruction: help me answer this question 3(7 + i7) + i(7 + i7) = 14 + i28, think step by step
### Assistant: Expanding the left side, we get 21 + 3i7 + 7i - i9 = 21 + i8 - i9 = 2 - i1 + 7i = 2 + 6i = 2 - i7 , The answer is 2 – i7
