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Most Important Selected Qs for JEE AdvancedMathematicsQuadratic Equation

If the equations p x^2+q x+r=0 and r x^2+q x+p=0(p r 0) have a negative common root, then the value of (p-q+r) is equal to

Options

  1. A-1
  2. B1
  3. C2
  4. D0

Correct answer

D. 0

Step-by-step solution

aligned & p x^2+q x+r=0 & r x^2+q x+p=0 & x=-1 aligned r x^2+q x+p=0 (on subtract) So common root is -1 p-q+r=0

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