notez rad(x) = radical din x
tu ai a=rad( 9 -2*rad(14) ) => a= rad( (rad(7) -rad(2) )^2 ) =>
=> a=rad(7)-rad(2)
b=rad(9+ 2*rad(14) ) => b=rad ( ( (rad(7) +rad(2) )^2 ) =>
=>b=rad(7) +rad(2)
=> a-b+2*rad(2) = rad(7) -rad(2) -rad(7) -rad(2) +2*rad(2) =0
deci 0 ^2014 =0 si apartine lui N
