diff --git a/notebooks/07-dev/Intro-and-Newton-Cotes.ipynb b/notebooks/07-dev/Intro-and-Newton-Cotes.ipynb
index 04bb50ae..6430d963 100644
--- a/notebooks/07-dev/Intro-and-Newton-Cotes.ipynb
+++ b/notebooks/07-dev/Intro-and-Newton-Cotes.ipynb
@@ -1366,7 +1366,7 @@
     "\n",
     "Additionally,\n",
     "\n",
-    "$$\\int\\limits_a^b \\frac{(x-a)^2}{2} f''(a)\\,dx = -\\frac{h^3}{6} f''(a) = O(h^3).$$\n",
+    "$$\\int\\limits_a^b \\frac{(x-a)^2}{2} f''(a)\\,dx = \\frac{h^3}{6} f''(a) = O(h^3).$$\n",
     "\n",
     "When we plug this into the original integral we get\n",
     "\n",
diff --git a/notebooks/07/Intro-and-Newton-Cotes.ipynb b/notebooks/07/Intro-and-Newton-Cotes.ipynb
index ce86dae9..763c969f 100644
--- a/notebooks/07/Intro-and-Newton-Cotes.ipynb
+++ b/notebooks/07/Intro-and-Newton-Cotes.ipynb
@@ -1263,7 +1263,7 @@
     "\n",
     "Additionally,\n",
     "\n",
-    "$$\\int\\limits_a^b \\frac{(x-a)^2}{2} f''(a)\\,dx = -\\frac{h^3}{6} f''(a) = O(h^3).$$\n",
+    "$$\\int\\limits_a^b \\frac{(x-a)^2}{2} f''(a)\\,dx = \\frac{h^3}{6} f''(a) = O(h^3).$$\n",
     "\n",
     "When we plug this into the original integral we get\n",
     "\n",