The equation \[4{{x}^{2}}+12xy+9{{y}^{2}}+2gx+2fy+c=0\] will represents two real parallel straight lines, if

The equation \[4{{x}^{2}}+12xy+9{{y}^{2}}+2gx+2fy+c=0\] will represent

1.	The equation \[4{{x}^{2}}+12xy+9{{y}^{2}}+2gx+2fy+c=0\] will represents two real parallel straight lines, if
A.	g = 4, f = 9, c = 0
B.	g = 2, f = 3, c = 1
C.	g = 2, f = 3, c is any number
D.	g = 4, f = 9, c > 1
Answer» D. g = 4, f = 9, c > 1

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The equation \[4{{x}^{2}}+12xy+9{{y}^{2}}+2gx+2fy+c=0\] will represents two real parallel straight lines, if

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