don steward
mathematics teaching 10 ~ 16

Saturday, 11 February 2012

(a + b) squared

"I'm going to think of two numbers
I'll square each one and then add them
Oh, no I won't, I'll add them and square the result
Do you think I'll get the same answer?"

students try out several numbers for 'a' and 'b'
find the difference between them and look for a pattern

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