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Q.

For the equation 2x2−62x−1=0

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a

roots are rational

b

roots are irrational

c

if one root is (p+q), the other is (−p+q)

d

if one root is (p+q), the other is (p-q)

answer is B.

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Detailed Solution

As the coefficients are not rational, irrational need roots not appear in conjugate pair.Here, α+β=32 and αβ=−12Let = α=p+q then prove that other root β=−p+q.
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