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As a solar energy technician apprentice, you use the efficiency deviation model g(x)=5x2x4g(x) = 5x^2 - x - 4 to calculate the variance in power output from a solar array, where xx represents the cell temperature deviation (in degrees Celsius) from the optimal operating temperature. To verify the system's baseline calibration during cold-weather testing, you evaluate the power variance when the temperature deviation is x=1x = -1. Evaluating g(1)g(-1) yields a power variance of ____.

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Updated 2026-05-31

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