If a^(2)+4b^(2)-9c^(2)=4ab, then the lin...

If `a^(2)+4b^(2)-9c^(2)=4ab`, then the line on which is meet the point of concurrency of family of straight line ax+by+3c=0 lies is

x+y=-1

x+y=1

x+y=3

2x-y=0

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AAKASH SERIES-PAIR OF STRAIGHT LINES-PRACTICE EXERCISE

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