CBSE Class 10 Answered
if one of the zeroes of quadratic polynomial F(x) = 4x² - 8kx - 9 is equal in magnitude but opposite in sign, find K
Asked by rrajansinghakb199 | 08 Apr, 2024, 05:12: PM
Expert Answer
4 x2 - 8kx - 9 = 0
By dividing above equation by 4, we get
x2 - 2 k x - (9/4) = 0 ...................... (1)
If α and β are roots of above equation, then we get
x2 + ( α + β ) x + α β = 0 ..............(2)
If roots are equal in magnitude and opposite in sign , then ( α + β ) = 0
By comparing eqn.(1) and (2) , we get
( α + β ) = - 2 k x = 0
Hence k = 0
Answered by Thiyagarajan K | 09 Apr, 2024, 08:46: AM
Application Videos
-
Nature of Roots
This video explains the concept of Discriminant and Nature of Roots. -
Determining roots and nature of roots using discriminan ...
This video explains a case study question on determining quadratic equat...
-
Quadratic Equation Equal Roots
The video explains an example based on the concept of equal roots of a q...
Concept Videos
-
Concept of discriminant to classify roots of quadratic ...
Understand the concept of discriminant to classify roots of quadratic equat... -
Nature of Roots
This video explains the concept of discriminant to classify roots of quadra... -
Nature of Roots
This video explains the concept of discriminant to classify roots of quadra... -
Quadratic Equations
Quadratic Equations, Nature of Roots -
D = 0
This video covers an application on nature of roots
CBSE 10 - Maths
Asked by dagardisha39 | 28 Apr, 2024, 12:58: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by rrajansinghakb199 | 08 Apr, 2024, 05:12: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by goyelgurav | 18 Dec, 2023, 11:23: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by mehraharshit.dk000 | 05 Oct, 2023, 08:05: PM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by atharvsharma971 | 06 Jun, 2022, 10:30: PM
ANSWERED BY EXPERT
CBSE 10 - Maths
Asked by ankur.spsharma | 02 May, 2022, 11:54: AM
ANSWERED BY EXPERTCBSE 10 - Maths
Asked by iambkhatun343 | 14 Feb, 2022, 12:57: AM
ANSWERED BY EXPERT
