diff --git a/docs/html/T_Accord_Math_Optimization_LevenbergMarquardt.htm b/docs/html/T_Accord_Math_Optimization_LevenbergMarquardt.htm
index cb1676497f..f1598063e2 100644
--- a/docs/html/T_Accord_Math_Optimization_LevenbergMarquardt.htm
+++ b/docs/html/T_Accord_Math_Optimization_LevenbergMarquardt.htm
@@ -236,9 +236,9 @@ <h1>LevenbergMarquardt Class</h1>
 
     <span class="highlight-comment">' Derivative in respect to the weights</span>
     .Gradient = <span class="highlight-keyword">Sub</span>(w, x, r)
-                    r(<span class="highlight-number">0</span>) = <span class="highlight-number">2</span> * w(<span class="highlight-number">0</span>) <span class="highlight-comment">' w.r.t a:     2a  </span>
-                    r(<span class="highlight-number">1</span>) = w(<span class="highlight-number">1</span>)     <span class="highlight-comment">' w.r.t b: b</span>
-                    r(<span class="highlight-number">2</span>) = w(<span class="highlight-number">2</span>)     <span class="highlight-comment">' w.r.t c: 0</span>
+                    r(<span class="highlight-number">0</span>) = x(<span class="highlight-number">0</span>) * x(<span class="highlight-number">0</span>) <span class="highlight-comment">' w.r.t a: x² </span>
+                    r(<span class="highlight-number">1</span>) = x(<span class="highlight-number">0</span>)     <span class="highlight-comment">' w.r.t b: x</span>
+                    r(<span class="highlight-number">2</span>) = <span class="highlight-number">1</span>     <span class="highlight-comment">' w.r.t c: 1</span>
                 <span class="highlight-keyword">End</span> <span class="highlight-keyword">Sub</span>
 <span class="highlight-keyword">End</span> <span class="highlight-keyword">With</span>
 
@@ -315,4 +315,4 @@ <h1>LevenbergMarquardt Class</h1>
         HT_mailLink.innerHTML = HT_mailLinkText;
         </script> </div>
   </body>
-</html>
\ No newline at end of file
+</html>