What's so hard about that? A point is above a straight line. Take this straight line as a function and bring it into this point. You can draw it yourself, the bottom of the formula is greater than zero, and the straight line brought in is less than zero.

You know, the sum of the two formulas brought in must be negative.

You know this is a negative number. The sum of the absolute values of the two formulas must be positive and negative. Must be the absolute value of the difference between two formulas.