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Question

If px2+5x+2=0 and 3x2+10x+q=0 have both roots in common, then
  1. p=4
  2. q=32  
  3. p=32
  4. q=4


Solution

The correct options are
C p=32
D q=4
Comparing both the equation px2+5x+2=0 and 3x2+10x+q=0, we get

p3=510=2qp=32,   q=4

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