http://www.algebrahelp.com/lessons/equations/solvebyfactoring/ [2]
http://www.algebrahelp.com/lessons/equations/completingthesquare/ [3]
Links[1] https://www.hootsgo.org/?q=node/6278 [2] http://www.algebrahelp.com/lessons/equations/solvebyfactoring/ [3] http://www.algebrahelp.com/lessons/equations/completingthesquare/