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If one real root of the quadratic equation 81x^2 + kx + 256 = 0 is cube of the other root, then a value of k is :

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If one real root of the quadratic equation 81x2 + kx + 256 = 0 is cube of the other root, then a value of k is : 

(1) –81 

(2) 100 

(3) –300 

(4) 144

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The correct option is (3).

Explanation:

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