(1-根号2)^2009*(1+根号2)^2007=-(根号2-1)^2009*(1+根号2)^2007=-(根号2-1)^2*(根号2-1)^2007*(根号2+1)^2007=-(3-2倍根号2)*[(根号2-1)(根号2+1)]^2007=-(3-2倍根号2)*1^2007=-(3-2倍根号2)=2倍根号2-3...