Answer: Simplified answer : 1-7i
Step-by-step explanation:
Since we have given that

We just need to solve this expression and change it into a+bi format,
So, we start simplifying the expression, we first separate the like terms and then add the like terms , so we get this as follows:

Here, a = 1 and b= - 7
and in a+bi format it shown as
1-7i