pair-st-lines

Related Questions

• The equation ${{x}^{2}}+k{{y}^{2}}+4xy=0$represents two coincident lines, if $k =$

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• The lines represented by the equation ${{x}^{2}}+2\sqrt{3}xy+3{{y}^{2}}-3x-3\sqrt{3}y-4=0$, are

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• The straight lines represented by the equation $9{{x}^{2}}-12xy+4{{y}^{2}}=0$ are

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• The equation of the perpendiculars drawn from the origin to the lines represented by the equation $2{{x}^{2}}-10xy+12{{y}^{2}}+5x-16y-3=0$ is

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• If $6{{x}^{2}}+11xy-10{{y}^{2}}+x+31y+k=0$ represents a pair of straight lines, then $k=$

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