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AP EAMCET · Maths · Pair of Lines

If the transformed equation of the equation \(2 x^2+3 x y-2 y^2-17 x+6 y+8=0\) after translating the coordinate axes to a new origin \((\alpha, \beta)\) is \(a X^2+2 h X Y+b Y^2+c=0\), then \(3 \alpha+c=\)

  1. A h
  2. B 2 h
  3. C \(2 \beta\)
  4. D \(\beta\)
Verified Solution

Answer & Solution

Correct Answer

(C) \(2 \beta\)

Step-by-step Solution

Detailed explanation

\(\frac{\partial f}{\partial x} = 4x + 3y - 17\) \(\frac{\partial f}{\partial y} = 3x - 4y + 6\) \(4\alpha + 3\beta - 17 = 0 \quad (1)\) \(3\alpha - 4\beta + 6 = 0 \quad (2)\) \(16\alpha + 12\beta - 68 = 0\) \(9\alpha - 12\beta + 18 = 0\)…