find matrix X by equation

I have a matrix A (301*409), and the equation A=10^(-0.761-1.328X+0.283X^2). I would like to find matrix X, which each value in X >0. How can I do this in Matlab?

Many thanks

Answer 1

[KSSV]

You can solve the equation using symbolic toolbox to get X and then substitute A into the obtained solution.

syms a x
eqn =  a-10^(-0.761-1.328*x+0.283*x^2)==0

eqn = 

s = solve(eqn,x)

s = 

In the above equation substitute A.