x^-2√2 x-3
=x^-2√2 x+2-5
=(x-√2 )^-5
=(x-√2+√5)(x-√2-√5)
（1-m）√1/m-1
=√1/m-√m^/m-1
=1/√m-√m-1
=1/√m-m/√m-√m/√m
=(1-m-√m)/√m
后面的自己算