pair-st-lines

Related Questions

• If the equation $A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0$ represents a pair of straight lines, then ${{B}^{2}}-AC$

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• The equation of the lines represented by the equation $ab({{x}^{2}}-{{y}^{2}})+({{a}^{2}}-{{b}^{2}})xy=0$ are

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• The angle between the lines represented by the equation $a{{x}^{2}}+xy+b{{y}^{2}}=0$ will be ${{45}^{o}}$, if

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• The equation of pair of lines joining origin to the points of intersection of ${{x}^{2}}+{{y}^{2}}=9$and $x+y=3$ is

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• The lines joining the points of intersection of the curve ${{(x-h)}^{2}}+{{(y-k)}^{2}}-{{c}^{2}}=0$ and the line $kx+hy=2hk$ to the origin are perpendicular, then

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