What is the value of p in the equation (15x2-px+120)=0 if the one root of it must be the double of the other.

90 as the roots are 30,60.

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parth21

  • Jan 23rd, 2008
 

first take product of roots that is
c/a=8
so one root is 2 and other one is 4

Now sum of roots is -b/a=>p/15=6

so ans is 90

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