Please solve my equation to be correct answer

clc
close all
clear all
syms T2 T3 T4 q_out;
X1 = [-2 1 0;1 -2 1;0 -1 1];
x2 = [T2 ;T3 ;T4];
T1 = 303;
q_gen = 1000;
k = 10;
L = 3;
h = 10;
delta_x = 1;
x1*x2 = [(-(q_gen)*(delta_x)^2)/k-T1;((-q_gen)*(delta_x)^2)/k;(q_gen*(delta_x)^2)/k-(q_out*(delta_x))/k

my eqaution cant run. Please fix above equation to correct

[Rik]

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