badge image

Enroll For Free Now & Improve Your Performance.

×
User Icon
User Icon
User Icon
User Icon
User Icon

Thank you for registering.

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

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

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

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 11

                        

if alpha = −1/2 is a root of the quadratic equation 8x 2 − bx− 3 = 0 find the value of b the other root beta (1/alpha−1/beta) 2

2 years ago

Answers : (1)

Arun
24737 Points
							
If alpha = -1/2 is a root hence alpha  should satisfy this quadratic equation
Put x = -1/2
8* 1/4  +b/2 -3 = 0
b/2 = 3-2
b/2 = 1
Hence 
b = 2
Now equation becomes
8x² -2x-3 = 0
Then by formula 
x = 12/16 = 3/4 & x = -1/2
Hence 
Beta = ¾
Now
(1/alpha - 1/beta)²
= (-2 -4/3)²
 = 100/9
Hope it helps
May be calculation mistake is lresent somewhere but concept is right
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 101 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details