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diff --git a/C_Programming:_A_Modern_Approach_by_K.N._King/Chapter27.ipynb b/C_Programming:_A_Modern_Approach_by_K.N._King/Chapter27.ipynb
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@@ -0,0 +1,72 @@
+{
+ "metadata": {
+  "name": "",
+  "signature": "sha256:d596457391df308a57bb59fde4173c6f3b60829cc798d3f2ffccce6ed1d54b31"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 27: Additional C99 Support for Mathematics"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 2,
+     "metadata": {},
+     "source": [
+      "Example quadratic.c, Page 723"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "import cmath\n",
+      "\n",
+      "a =5\n",
+      "b = 2\n",
+      "c = 1\n",
+      "\n",
+      "# calculate the discriminant\n",
+      "d = (b**2) - (4*a*c)\n",
+      "\n",
+      "# find two solutions\n",
+      "sol1 = (-b-cmath.sqrt(d))/(2*a)\n",
+      "sol2 = (-b+cmath.sqrt(d))/(2*a)\n",
+      "\n",
+      "print('root1 = {0} \\nroot2 = {1}'.format(sol1,sol2))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "root1 = (-0.2-0.4j) \n",
+        "root2 = (-0.2+0.4j)\n"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [],
+     "language": "python",
+     "metadata": {},
+     "outputs": []
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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