This past week in Pre-Calculus I learned that when a equation is irrational and comes to the square root at the end it must have a + and – sign with it. This represents that there are 2 possible answers, one with either a positive root sign and the other with a negative root sign. This is an example of what an equation would look like:

If the equations at the end were put into a calculatorÂ solved they wouldÂ give the points at which the parabola will cross the x-axis.