How to Solve Quadratic Equations by Factoring (NancyPi)

From a channel Lumen includes in full: NancyPi (Nancy, MIT-trained engineer) teaches algebra and calculus with clear, carefully explained example problems on a glass board.

A 11-minute video from NancyPi's catalogue; the title names its topic.

Video by NancyPi, played through YouTube's embedded player.