pair-st-lines

Related Questions

• The equation ${{x}^{2}}+{{k}_{1}}{{y}^{2}}+{{k}_{2}}xy=0$ represents a pair of perpendicular lines, if

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• The equation to the pair of straight lines through the origin which are perpendicular to the lines $2{{x}^{2}}-5xy+{{y}^{2}}=0,$is

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• The area of the triangle formed by the lines ${{x}^{2}}-4{{y}^{2}}=0$and $x=a$, 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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• The equation $2{{y}^{2}}-xy-{{x}^{2}}+6x-8=0$ represents

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