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If α and β are the zeros of x2 + (k2 – 1)x – 20, such that α2 – β2 – αβ = 29 and α – β = 9 then, the value of k is _______

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If α and β are the zeros of x<sup>2</sup> + (k<sup>2</sup> – 1)x – 20, such that α<sup>2</sup> – β<sup>2</sup> – αβ = 29 and α – β = 9 then, the value of k is _______





 
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