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TS EAMCET · Maths · Straight Lines

The transformed equation of 3x2+4xy+y2-8x-4y-4=0 is fX,Y=aX2+2hXY+bY2+c=0 when the origin is shifted to a new point by the translation of axes. Then f1,1=

  1. A 0
  2. B 1
  3. C -1
  4. D -8
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Answer & Solution

Correct Answer

(A) 0

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Detailed explanation

The transformed equation of 3x2+4xy+y2-8x-4y-4=0 is fX,Y=aX2+2hXY+bY2+c=0 Given 3x2+4xy+y2-8x-4y-4=0 Now let x=X+h  y=Y+k and put in given equation we get, ⇒  3X+h2+4X+hY+k+Y+k2-8X+h-4Y+k-4=0 ⇒ 3X2+Y2+4XY+X6h+4k-8+Y4h+2k-4+4hk+k2-8h-4k-4=0…