pair-st-lines

Question: If the slope of one of the lines given by $a{{x}^{2}}+2hxy+b{{y}^{2}}=0$is 5 times the other, then



1) $5{{h}^{2}}=ab$
2) $5{{h}^{2}}=9ab$
3) $9{{h}^{2}}=5ab$
4) ${{h}^{2}}=ab$
Solution: Explanation: No Explanation
Equation of pair of straight lines

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