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Difference between the corresponding roo...

Difference between the corresponding roots of `x^(2)+ax+b=0" and "x^(2)+bx+a=0` is same and `a ne b`, then

A

`a+b+4=0`

B

`a+b-4=0`

C

`a-b-4=0`

D

`a-b+4=0`

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The correct Answer is:
A
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