title: Expected square matrix?
body: <p>Kindly help in finding out the error. </p>
  
  <pre><code>import sympy as sp
  from scipy.linalg import solve
  x, y, z,w = sp.symbols('x,y,z,w')
  alpha,beta, gamma, delta = sp.symbols('alpha,beta,gamma,delta')
  f1 = alpha*y*z - beta*w
  f2= gamma*z - delta*x
  f3=-alpha*y*z + beta*w + x
  f4= -alpha*y*z + beta*w - gamma*z + delta*x
  K=solve(f1,f2,f3,f4)
  print K
  </code></pre>
  
  <p>The error showing is </p>
  
  <pre><code>Expected square matrix
  </code></pre>