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Question

If the roots of the equation x2+a2=8x+6a are real, then

A
aϵ(2,8)
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B
aϵ[2,8]
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C
aϵ(2,8)
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D
aϵ[2,8]
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Solution

The correct option is D aϵ[2,8]
Since, its roots are real
644(a26a)0
2a8
aϵ[2,8]

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