"Solve" function in 2 dimensional image

Hi every one,

Let say I have an equation:

256x256 * x + 256x256 * exp(x/2)^2 = 256*256

How to calculate "x" ? I have tried with the "solve" function, but I found some error. Will be very appreciate if anyone can help

Thanks

[Walter Roberson]

duplicates http://www.mathworks.co.uk/matlabcentral/answers/57744-solve-function-in-2-dimensional-image