Question

x = 1+2√5 , find x-2/ √x
pls answer.​

Answer 1

Answer:

21+4√5/19

Step-by-step explanation:

x=1+2√5

x-2/√x

1+2√5-2/1+2√5

(2√5-1)/2√5+1

rationalising denominator

(2√5-1)^2/(20-1)

21+4√5/19