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Question

The second degree equation x2+3xy+2y2x4y6=0 represent a pair of straight lines

A
True
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B
False
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Solution

The correct option is A True
If ahghbfgfc= 0 then the given equation represents a pair of straight lines.
Here ahghbfgfc=13/21/23/2221/226
= 1(-12 - 4) - 3/2(-9 - 1) - 1/2(-3 + 1)
= -16 + 15 + 1 = 0.
True.

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