don steward
mathematics teaching 10 ~ 16

Saturday 10 September 2011

tap top

a problem solving approach to factorising harder quadratic expressions  - by stealth, as he says, comes from the interesting work of Jason Dyer

go diagonally across the 'tap tops' to get the two factors
(top left number x with bottom right) times (top right number x with bottom left)

more questions than you will probably (ever) need:

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