Question

plz give the answer of this question in detail

Answer 1

x = (2+ √5)^2
√x = 2+ √5 or - 2 -√5

puting √x = 2+ √5
1/√x = 1/(√5 + 2) = (√5 -2)/(5-4) {× &÷ by √5-2}

1/√x = √5 - 2
√x - 1/√x = 2+√5 - √5 + 2 = 4

similarly u can try for √x= - 2 -√5