Question

Can the square of an integer be a negative number

Answer 1

No it can't
minus on minus gives plus

Answer 2

If you square an integer, there is no way to get a negative as a result.

Let's look at -5².

-5² means -5 × -5 or 25.

6² means 6 × 6 or 36.

So, there is no way to end up with a negative.