Question

Perform the indicated operation. (5 - 21 a 22 29 - 201 c 49 b 21 d 29

Answer 1

We have to perform this operation with this complex number:

`\begin{gathered} (5-2i)^2 \\ (5-2i)(5-2i) \\ 5^2+2\cdot(-2i)\cdot5+(-2i)^2 \\ 25-20i+4\cdot i^2 \\ 25-20i+4(-1) \\ 25-20i-4 \\ 21-20i \end{gathered}`

Answer: 21 - 20i