Q.

Let aR and let α,β be the roots of the equation x2+601/4x+a=0 If α4+β4=30 then the
product of all possible values of a is …………..

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answer is 45.

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Detailed Solution

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x2+601/4x+a=0α+β=601/4,αβ=a

α2+β2+2αβ=60

α2+β2=602a

α4+β4+2α2β2=60+4a2460a

30+2a2=60+4a2460a

2a2460a+90=0
Product of rots = 90/2 = 45

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