Well it’s not creating energy out of thin air. But it is moving it. So you get more energy moved than the amount of energy put in.
Well it’s not creating energy out of thin air. But it is moving it. So you get more energy moved than the amount of energy put in.
There’s no reason to bring the quadratic formula into this. Square roots can be negative, but when talking about the square root it’s normally assumed to be the principal square root, which is the positive one.