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One side of length 3a of a triangle of a...

One side of length 3a of a triangle of area `a^(2)` square units lies on the line x = a. Then one of the lines on which the third vertex lies, is

A

`x= -a^(2)`

B

`x=a^(2)`

C

x = -a

D

`x=(a)/(3)`

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The correct Answer is:
D
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