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Question

The lines represented by the equation 9x2+24xy+16y2+21x+28y+6=0 are


A

Parallel

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B

Coincident

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C

Perpendicular

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D

skew lines

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Solution

The correct option is A

Parallel


Given lines are not perpendicular i.e., a -b

Checking for parallel lines, ah=hb=gf

(3x + 4y + 6)(3x + 4y + 1) = 0 912=1216=2128

Hence lines are parallel.


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