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If the quadratic equations `3x^2 + ax + 1 = 0` and `2x^2 + bx + 1 = 0` have a common root then the value of `5ab-2a^2-3b^2` , where `a b in R` , is equal to

A

zero

B

1

C

`-1`

D

none of these

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The correct Answer is:
B
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