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NDA 2011
Exam
NDA
Year
2011
Subject
Mathematics
Chapter
Quadratic Equation

NDA 2011 · Mathematics · Quadratic Equation

If the equations x^2-p x+q=0 and x^2-a x+b=0 have a common root and...

If the equations x2−px+q=0x^2-p x+q=0 and x2−ax+b=0x^2-a x+b=0 have a common root and the roots of the second equation are equal, then which one of the following is correct?

Options

  1. Aaq=2(b+p)a q=2(b+p)
  2. Baq=b+pa q=b+p
  3. Cap=2(b+q)a p=2(b+q)
  4. Dap=b+qa p=b+q

Correct answer

C. ap=2(b+q)a p=2(b+q)

Step-by-step solution

The correct answer is option C
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