Finding coefficients of quadratic equation without Symbolic Toolbox.

I have an equation in the form X = Y/(Y + A + BY + CY^2), where X and Y are known. I need to find out the coefficients A, B and C. And, I don't have the Symbolic Toolbox. I tried it using the polyfit function but was unsuccessful. I have a matrix from where I can extract the values for X and Y.

Any suggestions??

Thanks

[Star Strider]

Do you have the Optimization Toolbox or the Statistics Toolbox?

Are X and Y vectors or scalars?

Answer 1

[José-Luis]

You don't really need the symbolic toolbox for that. For instance, one of the solutions will always be a = y/x, b = -1 and c = 0. If you need more solutions then you just plug in whatever you want to two of the three coefficients and calculate the last one.