Формули скороченого множення

https://www.mindmeister.com/1278366117?t=S0CuyTifiZ

https://www.youtube.com/watch?v=fqZ_p728BTY

http://test.teacherjournal.in.ua/attachments/article/3890/Gusak_G_V_1.pdf

https://docs.google.com/presentation/d/179gd2IkCFrskekFjdv460XbV03tg5gGuUb3pZyky5Lw/edit#slide=id.p

https://docs.google.com/forms/d/1a1LQaPaqNrgZ2a_0_M1pI6xMSvs3c04PDLFDx8wvjp8/edit

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