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The equation x^(2)-7xy-y^(2)=0 represent...

The equation `x^(2)-7xy-y^(2)=0` represents

A

Circle

B

Pair of parallel straight lines

C

pair of perpendicular straight lines

D

Pair of non-perpendicular intersecting straight lines

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The correct Answer is:
D
NA
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TARGET PUBLICATION-PAIR OF STRAIGHT LINES-COMPETITIVE THINKING
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  12. If one of the lines given by 6x^2- xy +4cy^2=0 is 3x +4y=0, then c=

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