title: Evaluating functions at several points
body: <p>I want to evaluate f[x,y]=-4 x + x^2 - 4 y - y^2 at points (1,-2); (2,-3); (3,-2); (2,-1).</p>
  
  <p>I tried using <em>Outer</em> but for some reason it does not give me actual values. Help.</p>