Question

if x is equals to 2 + root 5 find the value of x plus one upon x​

Answer 1

Answer:

x = 2 + √5

1/x = 1/ (2 + √5) * (2-√5)/(2-√5)

= 2 - √5 /(4 - 5)

= 2 - √5 /(-1)

= -2 + √5 or √5 - 2

x + 1/x = 2 + √5 + √5 - 2 = 2√5

Answer 2

Answer:

x=2+√5

then 1/x=1/2+√5*2-√5/2-√5

=2-√5/4-5

=2-√5/-1

=-2+√5

so,x+1/x=2+√5-2+√5

=2√5