Question

Which of the following is equivalent to (5-7i)(5-7i)

Answer 1

Explanation:

Here we are multiplying together two complex numbers which happen to be identical: both are 5 - 7i).

This is also "the square of 5 - 7i: (5 - 7I)^2

In both cases, the result is 25 - 35i - 35i - 49, or 74 - 70i