Find the exact real solutions to the equation, if they exist. 
Definitions:
Signal Detection Theory
A theoretical framework used to understand how decision makers differentiate between important stimuli in the presence of noise, focusing on the ability to correctly identify signals.
Absolute Threshold
The absolute threshold is the minimum intensity of stimulus that an individual can detect at least 50% of the time.
Just Noticeable Difference
The minimum level of stimulus intensity change needed to detect a difference between two stimuli.
Amplitudes
The height or strength of a wave signal, representing the magnitude of the fluctuation or displacement from a baseline.
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