Hello!

Today my maths teacher gave me a task. I don't know why he thought that I am some sort of computer GURU but I couldn't deny this task because it is very important for me to automatically get to 10th grade in my school without entrance examination.

The task is to program a graph which automatically solves functions.

Basically it has to work for this function system:

- x(square root) + y(square root) = R(square root)

- x(square root) - y(square root)=number(square root)

I didn't quit understand the whole thing. Teacher said that there isn't a graph for x(square root) - y(square root)=number(square root) and he proved it so I don't know if I have to include it.

Any help will be much apprieciated. Maybe there's already an app or program that can solve this or maybe a website. Anything really will help.