Question

If x=4-√5 then find the value of (x+1/x)^2=?

Answer 1

           solution

given that   x=4-√5

  (x+1/x)²=(4-√5+1/(4-√5))²

   =(((4-√5)(4-√5)+1)(4-√5))²

  =((16-8√25+√25))/(16+5))

   =(16-8*5+5)/21)

   = (21-40)/21

 =-19/21

Answer 2

hlo , please check your question that instide of √5 there would be√15.V