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: NULL

                        

if the each alggebric expression lx^2+mx+n, mx^2+nx+l and nx^2+lx+m are perfect squares then what is (l+m)/n sir is the answer to this is 2

2 years ago

Answers : (1)

Arun
25089 Points
							
all the expression have D = 0
 
hence
 
x = – m / 2l              …....(i)
 
x =  – n / 2m            ….....(ii)
 
x = – l / 2n         ….........(iii)
 
from eqn (i)
 
m = – 2lx
 
pu this in (ii)
 
n = 4lx^2
 
hence x = – ½
 
 
if you put this in (i) and (ii)
 
you get l = m = n
 
hence
 
l + m / n
 
 = m + m / m
 
 = 2 m / m
 
 = 2
 
hope it helps
2 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

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


Course Features

  • 731 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