The lines joining the origin to the points of intersection of the curves \[a{{x}^{2}}+2hxy+b{{y}^{2}}+2gx=0\] and \[a'{{x}^{2}}+2h'xy+b'{{y}^{2}}+2g'x=0\] will be mutually perpendicular, if [UPSEAT 1999]

The lines joining the origin to the points of intersection of the curv

1.	The lines joining the origin to the points of intersection of the curves \[a{{x}^{2}}+2hxy+b{{y}^{2}}+2gx=0\] and \[a'{{x}^{2}}+2h'xy+b'{{y}^{2}}+2g'x=0\] will be mutually perpendicular, if [UPSEAT 1999]
A.	\[g(a'-b')=g'(a+b)\]
B.	\[g(a'+b')=g'(a+b)\]
C.	\[g(a'+b')=g'(a-b)\]
D.	\[g(a'-b')=g'(a-b)\]
Answer» C. \[g(a'+b')=g'(a-b)\]

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The lines joining the origin to the points of intersection of the curves \[a{{x}^{2}}+2hxy+b{{y}^{2}}+2gx=0\] and \[a'{{x}^{2}}+2h'xy+b'{{y}^{2}}+2g'x=0\] will be mutually perpendicular, if [UPSEAT 1999]

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