(1-√2)^2006*(1+√2)^2008
=(1-√2)^2006*(1+√2)^2006*(1+√2)^2
=[(1-√2)*(1+√2)]^2006*(1+√2)^2
=[1-2]^2006*(1+√2)^2
=1*(1+√2)^2
=(1+√2)^2
=3+2√2
(1-√2)^2006*(1+√2)^2008
=(1-√2)^2006*(1+√2)^2006*(1+√2)^2
=[(1-√2)*(1+√2)]^2006*(1+√2)^2
=[1-2]^2006*(1+√2)^2
=1*(1+√2)^2
=(1+√2)^2
=3+2√2