Fifth-degree equation solving app

[SteveJG]

Here is a discussion about solving a 4th degree equation using App Inventor that may help you.

Solving fourth-degree equations app

An application for solving fourth-degree equations. [eq] I applied the solution values of x ​​as in the picture and took them from the following reference, [Roots-of-fourth-order-polynomial-equation] https://www.researchgate.net/figure/Roots-of-fourth-order-polynomial-equation_fig13_47715135 but the application gives wrong results and I do not know why. I compared the results on the wolframalpha website. I don't know if the error is in the application or in the equations in the reference …