The gradient of one of the lines of \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\] is twice that of the other, then [MP PET 2000; Pb. CET 2002]

The gradient of one of the lines of \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\] i

1.	The gradient of one of the lines of \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\] is twice that of the other, then [MP PET 2000; Pb. CET 2002]
A.	\[{{h}^{2}}=ab\]
B.	\[h=a+b\]
C.	\[8{{h}^{2}}=9ab\]
D.	\[9{{h}^{2}}=8ab\]
Answer» D. \[9{{h}^{2}}=8ab\]

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The gradient of one of the lines of \[a{{x}^{2}}+2hxy+b{{y}^{2}}=0\] is twice that of the other, then [MP PET 2000; Pb. CET 2002]

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