Q. 85.0( 1 Vote )

Find the value of

Answer :

mx(5x-6) + 9 =0

5mx2-6mx + 9=0


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


Where a=5m, b=-6m, c=9


For equal roots, D=0


D=b2-4ac=0


Substituting the values of a,b and c


(-6m)2-4(5m)(9)=0


36m2-180m=0


36(m2-5m)=0


m(m-5)=0


There are two possible values of m, m=0 and m=5


But if m=0, then the equation will not remain quadratic,
m=5.


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