The square root function only has a single answer for every x. This is intentional. The technical definition of function means there can only be a single y value for every x value. Of course, there are situations where you need to consider the positive and negative square root, and that’s why the quadratic equation has the ± symbol.
The square root function only has a single answer for every x. This is intentional. The technical definition of function means there can only be a single y value for every x value. Of course, there are situations where you need to consider the positive and negative square root, and that’s why the quadratic equation has the ± symbol.