Question

find the value of x to the power 4 plus one upon x to the power 4 if x is under root 4 minus under root 5

Answer 1

i dont know the answer 

sorry bro

Answer 2

x=√4-√5
1/x=1/(√4-√5)=√4+√5/(-1)

then,
x-1/x=2√4=4
squaring,
x^2+1/x^2-2=16
x^2+1/x^2=18
squaring
x^4+1/x^4=322