Question

12. If χ= (7-4V3) then(x+1/x)=?
..8V3
..14
..49
..48
answer me fast I will mark you brainlist​

Answer 1

Answer:If x=7+4√3 then

1/x=7–4√3/(7+4√3)(7–4√3)

1/x=7–4√3/49–48=7–4√3

Now(√x+1/√x)^2=x+1/x+2

=>7+4√3+7–4√3+2=16

(√x+1/√x)^2=16

Taking squareroot√x+1/√x=4

Step-by-step explanation: