A negative number is 12 less than it's square. find the number

A negative number that is 12 less than its square is - 3.

Step-by-step explanation:

This is because (-3) ² = 9 and 9 - 12 = - 3.

You can get this answer by testing different number until one works in the given situation. This is done by testing numbers by squaring them and then subtracting 12 to see if it equals the original number.