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MIT grad shows how to solve any quadratic equation by factoring. Follow her on Twitter! http://twitter.com/mathbff
MIT grad shows how to factor quadratic expressions. If you want to skip straight to the shortcut trick, jump to 5:06. Follow her on Twitter! http://twitter.com/mathbff
some non-calculator examples of finding an original amount when given an amount that has had a percentage taken from or added to it.
MIT grad shows how to find sin, cos, and tan using SohCahToa
GCSE maths revision lesson on Highest Common Factor (HCF) and Lowest Common Multiple (LCM).
how you find prime factors using the factor tree method
Why do mirrors flip horizontally (but not vertically)?