pair-st-lines

Question: 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

1) ${{a}^{2}}+{{d}^{2}}=2ac$

2) ${{a}^{2}}+{{d}^{2}}=2bd$

3) ${{a}^{2}}+ac+bd+{{d}^{2}}=0$

4) ${{a}^{2}}+{{d}^{2}}=4bc$

Solution:

Explanation: No Explanation

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