Need to know how to solve a quadratic equation that won't factor? Watch this free video algebra lesson to learn how to solve it by completing the square. From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).
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