If two of the three lines represented by the equation \[a{{x}^{3}}+b{{x}^{2}}y+cx{{y}^{2}}+d{{y}^{3}}=0\] are perpendicular, then

\[{{a}^{2}}+ac+bd+{{d}^{2}}=0\]

If two of the three lines represented by the equation \[a{{x}^{3}}+b{{

1.	If two of the three lines represented by the equation \[a{{x}^{3}}+b{{x}^{2}}y+cx{{y}^{2}}+d{{y}^{3}}=0\] are perpendicular, then
A.	\[{{a}^{2}}+{{d}^{2}}=2ac\]
B.	\[{{a}^{2}}+{{d}^{2}}=2bd\]
C.	\[{{a}^{2}}+ac+bd+{{d}^{2}}=0\]
D.	\[{{a}^{2}}+{{d}^{2}}=4bc\]
Answer» D. \[{{a}^{2}}+{{d}^{2}}=4bc\]

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If two of the three lines represented by the equation \[a{{x}^{3}}+b{{x}^{2}}y+cx{{y}^{2}}+d{{y}^{3}}=0\] are perpendicular, then

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