Question

If x+1/x = 15, find the value of x2+1/x2.
50 points for this answer

Answer 1

Sol:
x + 1 x = 7
⇒ (x + 1 x )2 =(7)2
⇒ (x2+ 1 x 2 + 2) = 49
⇒ x2+ 1 x 2 = 47

Therefore, x2+ 1 x 2 = 47.

Answer 2

Answer:

Given :

( x + 1 /x ) = 5

We need to find x2 + 1 / x2

( x + 1 / x )2 = 25

= x2 + 1 / x2 + 2 (x)(1/x) = 25

= x2 + 1/x2 + 2 = 25

= x2 + 1 / x2 = 25 – 2

= x2 + 1 / x2=23

Hence x2 + 1 / x2 = 23

Step-by-step explanation:

I think it help you thank you please mark me as brainliest answer please tap on it and verify my answer please