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Question: Answered & Verified by Expert
If \(\alpha, \beta\) are the roots of the equation \(\mathrm{ax}^2+\mathrm{bx}+\mathrm{c}=0\), then the roots of the equation \(\mathrm{ax}^2+\mathrm{bx}(\mathrm{x}+1)+\mathrm{c}(\mathrm{x}+1)^2=0\) are
MathematicsQuadratic EquationBITSATBITSAT 2011
Options:
  • A \(\alpha-1, \beta-1\)
  • B \(\alpha+1, \beta+1\)
  • C \(\frac{\alpha}{\alpha-1}, \frac{\beta}{\beta-1}\)
  • D \(\frac{\alpha}{1-\alpha}, \frac{\beta}{1-\beta}\)
Solution:
2334 Upvotes Verified Answer
The correct answer is: \(\frac{\alpha}{1-\alpha}, \frac{\beta}{1-\beta}\)
The second equation can be rewritten as
\(a\left(\frac{x}{x+1}\right)^2+b\left(\frac{x}{x+1}\right)+c=0\)
and hence its roots correspond to \(\frac{\mathrm{x}}{\mathrm{x}+1}=\alpha\) and \(\frac{x}{x+1}=\beta\).
Hence \(x=\frac{\alpha}{1-\alpha}\) and \(\frac{\beta}{1-\beta}\).

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