1.0 video Lesson 55 Solving Quadratic Equations Using the Quadratic Formula 960 540 iPlayerHD https://iplayerhd.com <iframe src="//iplayerhd.com/player/video/3e3ab276-fb07-4018-8b2a-e8da6c43f300?cbartype=over" allowtransparency="true" frameborder="0" scrolling="no" allowfullscreen mozallowfullscreen webkitallowfullscreen oallowfullscreen msallowfullscreen width="960" height="540"></iframe>