Question

If x+ √15 = 4, then x +

1/x



=?​

Answer 1

Answer:

which class?

Step-by-step explanation:

Answer 2

Answer:

(4-√15)+(4+√15)

Step by step explanation:

Given,

X+√15=4.

X=4-√15

X+1/x=(4-√15)+1/(4-√15)

1/(4-√15)

=[1/(4-√15)] [(4+√15)/(4+√15)]

=[4+√15]/[4²-(√15)²]

=(4+√15)/(16-15)

=(4+√15)/1

=4+√15.

So,

X+1/X=(4-√15)+(4+√15)