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If the quadratic equation ax^2+bx+c=0 ha...

If the quadratic equation `ax^2+bx+c=0` has -2 as one of its roots, then ax+by+c=0 represents

A

a family of concurrent lines

B

a family of parallel lines

C

a line parallel to x-axis

D

a line perpendicular to x-axis

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The correct Answer is:
A
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