Thank you for registering.

One of our academic counsellors will contact you within 1 working day.

Please check your email for login details.
Close
MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

⇐ BackProceed to Checkout ⇒
There are no items in this cart.
Continue Shopping

x 2 -x-1 = 0 and x>0 then what is the value of x 2 +(1/x 2) =? a)3 b) (1+5+2*5 1/2 ) / 2(1+5 1/2 +2) c) 3+5 1/2 d) 6

x2-x-1 = 0 and x>0 then what is the value of x2+(1/x2) =?
a)3
b) (1+5+2*51/2) / 2(1+51/2+2)
c) 3+51/2
d) 6
 

Grade:9

1 Answers

Hasan Naqvi
97 Points
6 years ago
x2- x – 1 =0
dividing by x,
x – 1 – 1/x =0
x – 1/x = 1
Squaring both sides
x2 + 1/x2 - 2 = 1
x2 + 1/x2 = 3

Think You Can Provide A Better Answer ?

Provide a better Answer & Earn Cool Goodies See our forum point policy

Other Related Questions on Algebra

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Register ICAT

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More