pls help :How to use solve function ?

I'm new to Matlab and i'm going crazy here trying to solve a complicated equation and I would be grateful for your help:

I have an equation that I need to solve for the value T :

Eg_zero=1.17;
a=4.73*10^(-4);
b=636;
k=8.6*10^(-5);
ni_ge=2.4*10^(13);
Nc_zero=2.8*10^(19);
Nv_zero=1.04*10^(19);

syms T;

num=solve(T^(3/2)*3.277*10^15 * exp(-Eg_zero/(2*k*T) +a*T*(2*k*(T+b))) -ni_ge );

I'm getting the value(num) for T in "sym" and because of it i can't print it to the screen without bracket...

output:

num =
matrix([[478.49806197291962670801556142632]])

pls tell me whats wrong here?

Answer 1

[Walter Roberson]

double(num)

[eladtk]

thanks