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If equations 2x^2 + bx + b = 0 and x^2 +...

If equations `2x^2 + bx + b = 0 and x^2 + 2x + 2b = 0, b != 0,b != C` (where 'C' is a set of complex numbers) have a common root, then `|(b-8)/b|` is

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