Let’s take –3

Square of –3 = (–3)
^{
2
}

= –3 × –3

= 3 × 3

= 9

So, square of a number is always positive

And, we saw that 3
^{
2
}
= 9

So, (–3)
^{
2
}
= 3
^{
2
}

Therefore, when we square a negative number,

the answer is same as that when we square a positive number