1.

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

A.            \[2{{x}^{2}}-xy-6{{y}^{2}}=0\]                                          
B.            \[6{{x}^{2}}-xy+2{{y}^{2}}=0\]
C.            \[6{{x}^{2}}-xy-2{{y}^{2}}=0\]                                          
D.            \[2{{x}^{2}}+xy-6{{y}^{2}}=0\]
Answer» B.            \[6{{x}^{2}}-xy+2{{y}^{2}}=0\]


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