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ISRO2012-ECE Number system

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x^2 + 4x + 6 + 3(x-2)^2 + (x-2) + 3 = 8^2*2 + 8*4 + 6

Solving this equation we get 

4x^2 -7x - 147 = 0

x = 7 

Ans C

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