Using Casios for finding roots using Deflation

[Matt Agajanian]

Please advise.

In calculus there is a method for finding several roots of a function called deflation.

When a root is found, that’s root one, r1.

To find the next root, the function becomes f(x)/(x-r1). If a root is found, that’s root two, r2.

To find the next root, the function to solve is (f(x)/(x-r1))/(x-r2)

My question is, to make this repetitive process easier, I’d like to just modify the function accordingly to find successive root. Problem is that after I find a root, I can’t just store the result in a variable and keep the function intact so I can continue editing it for finding the next root.

The way I need to exit the solver, erases the function I’m evaluating.

How can I retain the function so I can edit it to find successive roots on the 991EX Classwiz, fx-991ES Plus, and fx-115ES Plus?

Thanks