If the equation \[A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0\] represents a pair of straight lines, then \[{{B}^{2}}-AC\] [MP PET 1992]

If the equation \[A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0\] represents a

1.	If the equation \[A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0\] represents a pair of straight lines, then \[{{B}^{2}}-AC\] [MP PET 1992]
A.	< 0
B.	= 0
C.	> 0
D.	None of these
Answer» E.

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If the equation \[A{{x}^{2}}+2Bxy+C{{y}^{2}}+Dx+Ey+F=0\] represents a pair of straight lines, then \[{{B}^{2}}-AC\] [MP PET 1992]

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