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A value of b for which the equation x^2+...

A value of `b` for which the equation `x^2+b x-1=0,x^2+x+b=0` have one root in common is `-sqrt(2)` b. `-isqrt(3)` c. `sqrt(2)` d. `sqrt(3)`

A

`-sqrt(2)`

B

`-isqrt(3)`

C

`isqrt(5)`

D

`sqrt(2)`

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The correct Answer is:
b
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