![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The qudractic equation is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1e8d7495e466815f9abf336ee8eea65f.png\")
.
The equation compare to quadractic equation, then a = 1, b = 8 and c = 16.
\The value of discriminant ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a2e5c6a29320c3fb42a17a5721fbf710.png\")
.
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=55744ed2a02744e1ad3dcea75d5870f3.png\")
(Evaluate power: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=395d53af3aaa1a043ab6cb8c4afde58c.png\")
)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ad2d009f9229a2cd0d89143b30f8b9f9.png\")
(Simplify)
= 0 (Apply additive inverse property: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a23357425454841806e549a134e4c3b1.png\")
)
Since the discriminant is zero, the equation is a double root. ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
The equation is a double root.