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Let A be a real number. Then the roots of the equation $$x^2 - 4x - log_{2}{A} = 0$$ are real and distinct if and only if
The roots of $$x^2 - 4x - log_{2}{A} = 0$$ will be real and distinct if and only if the discriminant is greater than zero
16+4*$$log_{2}{A}$$ > 0
$$log_{2}{A}$$ > -4
A> 1/16
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