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Question

If α,β are the roots of the equation (ax2+bx+c=0), then what is the value of α3+β3?

A
b3+3abca3
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B
a3b33ab
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C
3abcb3a3
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D
b33abca3
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Solution

The correct option is C 3abcb3a3
α+β=ba and αβ=ca
α3+β3=(α+β)33αβ(α+β)
=b3a33ca(ba)=b3+3abca3
=3abcb3a3

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