if you mean this
sqrt(4-3/4) then
remember 4 cubed is 64, the fourth root of 64 is 2sqrt2
then answer=1/2sqrt2 or sqrt2/4
Under root 4 raised power minus 3 by 4
2 answers
(2)minus power3/4. (1/2) power3/4 ( (1/2) power3 ) hole power1/4