The lines represented by the equation \[9{{x}^{2}}+24xy+16{{y}^{2}}+21x+28y+6=0\] are

The lines represented by the equation \[9{{x}^{2}}+24xy+16{{y}^{2}}+21

1.	The lines represented by the equation \[9{{x}^{2}}+24xy+16{{y}^{2}}+21x+28y+6=0\] are
A.	Parallel
B.	Coincident
C.	Perpendicular
D.	None of these
Answer» B. Coincident

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The lines represented by the equation \[9{{x}^{2}}+24xy+16{{y}^{2}}+21x+28y+6=0\] are

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