How to use calculator in these equations

[Jakie]

I have these equations in my kkt lesson, I want to find values of x1 and x2 using calculator casio fx-991es , I only want the steps to find it using calculator because I’m not very good at algebra

 

[Deleted member 4993]

I have these equations in my kkt lesson, I want to find values of x1 and x2 using calculator casio fx-991es , I only want the steps to find it using calculator because I’m not very good at algebra

Have you tried to consult the user's manual?

Casio has an active user's group - have you tried to ask those folks?

I do not have Casio 991-ES. Even if I did have one, I would not have used the calculator to solve DE.