Q. 205.0( 5 Votes )

If one root of a

Answer :

Since -5 is the zero of the first equation,

Put x = -5 in first equation


2(-5)2 + p (-5) – 15 = 0


2× 25 – 5p – 15 = 0


5p = 50 – 15


5p = 35


p = 7


If the roots are equal, then


b2 – 4ac = 0


When we compare the above quadratic equation with the generalized one we get,


ax2 + bx + c = 0


a = p = 7


b = p = 7


c = k


(7)2 – (4 × 7 × k) = 0


(7)2 – 28 k = 0


28k = 49


k = 49 / 28


k = 7 / 4


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
caricature
view all courses
RELATED QUESTIONS :

If u(x) = (x – 1)Rajasthan Board Mathematics

Find the lowest cRajasthan Board Mathematics

Solve the followiRajasthan Board Mathematics

Solve the followiRajasthan Board Mathematics

The area of a recRajasthan Board Mathematics

The LCM and HCF oRajasthan Board Mathematics

If α and β are thRajasthan Board Mathematics

Find the zeroes oRajasthan Board Mathematics

Write ShridharachRajasthan Board Mathematics

Solve the followiRajasthan Board Mathematics