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
Duration : 0:1:21
[youtube erWv_IZdhGk]