title: MATLAB : function call returns different value for same x
body: <p><a href="https://i.stack.imgur.com/cutJm.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cutJm.jpg" alt="MATLAB debugging"></a></p>
  
  <p>I am currently in the debugging process, and I found that this is happening, ruining everything. For reference, f =  @(x)a<em>x^3+b</em>x^2+c*x+d (where in this specific case, a = 2, b = -7, c = -8, d = 16).</p>
  
  <p>Also, I notice that temp == -1.6861 returns false..</p>