The answer would be 16.
If we plug the value into the equation, we get the that number squared. It is important to remember that even if the original number is negative, we get a positive answer.
-4^2 = 16
A = -4
Solve for A²
(-4)² = (-4) * (-4)
The - canceled out the other - making it 4 * 4
4 * 4 = 16
