pair-st-lines

Related Questions

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• $2{{x}^{2}}+7xy+3{{y}^{2}}+8x+14y+\lambda =0$ will represent a pair of straight lines, when $\lambda $=

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• The angle between the pair of lines $2{{x}^{2}}+5xy+2{{y}^{2}}+3x+3y+1=0$ is

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• The equation of the lines passing through the origin and parallel to the lines represented by the equation $2{{x}^{2}}-xy-6{{y}^{2}}+7x+21y-15=0$, is

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