math trick to square 2 digit numbers

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Uploaded by on Oct 6, 2009

this works for numbers like 104 also (its basicly the trick that glad2teach shows, it turns out i already knew it )
look at it like (100 + 4)^2
(10000 + 800 + 16) = 10816

same thing, i will explain more in my new video

i forgot to give an example after explaining multiplying bi-nomials

here is an example

(x+6)^2

A=X, B=6

A^2 = X^2
2AB=12X
B^2=36

A^2+2AB+B^2 ....... X^2+12x+36

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