Q. 73.5( 4 Votes )

<span lang="EN-US

Answer :

px(x-3) + 9=0

px2-3px + 9=0

This is a quadratic equation of form ax2 + bx + c=0

Where a=p, b=-3p, c=9

For equal roots, D=0


Substituting the values of a,b and c





There are two possible values of p, p=0 and p=4

We neglect p=0 as on putting p=0; the equation does not remain quadratic.

p=4 is our required answer.

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
view all courses