Convert state-space representation (MIMO) to transfer function matrix

A = [-1.5,-2;1,0];
B = [0.5;0];
C = [0,1];
D = 0;
sys = ss(A,B,C,D)
sys_as_tf = tf(sys)

sys =
 
  A = 
         x1    x2
   x1  -1.5    -2
   x2     1     0
 
  B = 
        u1
   x1  0.5
   x2    0
 
  C = 
       x1  x2
   y1   0   1

sys_as_tf = tf(sys)

sys_as_tf =
 
        0.5
  ---------------
  s^2 + 1.5 s + 2
 
Continuous-time transfer function.