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Joe Horn · (This post was last modified: 05-01-2018 01:46 AM by Joe Horn.)

(1) That's not an equation.

(2) Your comment #2 indicates that you meant the denominator to be X^2+5X (which is the way it was typed into HP's calculator forum and into your HP Prime), not X^2-5X.

(3) Both apps' graphs show the root to be at X=5, not at X=0.

(4) The vertical line at X=-5 is the Advanced Graphing app's way of indicating a removable singularity. It does not indicate another root. Try Y=(X^3-X)/(X^2-1) to see another example of this in action.

(5) Yes, the Function app differs from the Advanced Graphing app. This is intentional. If they were identical, there would be no reason to have both.