=(4-15^1/2)^(-1)*(5^0.5-3^0.5)=
=1\(16-15)^0.5*(5^0.5-3^0.5)=
=1/1^ 0.5*(5^0.5-3^0.5)=
=((5-3)/1)^0.5=
=2^0.5
!ответ корень из двух!
