Turn on thread page Beta
please help me / non-linear equation watch
- Thread Starter
- 31-01-2017 08:22
- 31-01-2017 12:10
If you are setting a puzzle for interested readers then say so. There is a place for that kind of thing but that place is not in this thread.
Now to the solution. Effectively this is a quintic and most people would solve a quintic numerically. There may be an analytic method in special cases but I think there is no general analytic solution for quintics.
It is a quintic because you need to get an equation in one variable and since all three equations involve all three variables, each substitution gives you an increase in powers of the unknowns involved.
My single unchecked calculation gives me y=1.75 plus four complex solutions which I did on Wolfram alpha solving
- 31-01-2017 12:14
Make x the subject in the 1st equation.
Then sub in for x in the other 2 equations.
Try that and see where it goes.