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AP EAMCET202124 Aug 2021Evening ShiftMathematicsPair of LinesActual

Find the length of the intercept cut by the pair of lines 2 x^2+4 x y-4 y^2-6 x-8 y+7=0 over the Y -axis

Options

  1. A12
  2. B10
  3. C11
  4. D13

Correct answer

C. 11

Step-by-step solution

Given, pairs of straight line 2 x^2+4 x y-4 y^2-6 x-8 y+7=0 For length of intercept on Y -axis put x=0-4 y^2-8 y+7=0 4 y^2+8 y-7=0y= -8 64+112 8 y= -8 4 11 8 Length of intercept = 2 4 8 11 = 11

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