Fri 14 Apr, 2006 09:50 am - foil
it is called foiling
(x+y)(x+y)
is equivlent to
x*(x+y)+y*(x+y)
when we do this we get
(x^2+xy)+(yx+y^2)
adding the like terms gives us
x^2+2xy+y^2 (view)
Fri 14 Apr, 2006 09:43 am - The answer is simple
His house is centered on the south pole. talking magneticly any direction from the south pole is north. (view)
