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MHT CET202016 Oct 2020Evening ShiftMathematicsPair of LinesActual

The straight lines represented by the equation 9 x²-12 x y+4 y²=0 are

Options

  1. Acoincident
  2. Bperpendicular
  3. Cintersect at 60^
  4. Dparallel

Correct answer

D. parallel

Step-by-step solution

(C) The given pair of lines are of the form a x²+2 h x y+b y²=0 a=9,2 h=-12, h=-6, b=4h²-a b=(-6)²-(9 4)=36-36=0 Therefore the lines are coincident

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