Short Answer

Evaluating Signs in Safety Stock Calculations

In a logistics facility, a warehouse supervisor uses the formula 2x25x+3{}2x^2 - 5x + 3 to calculate safety stock adjustments, where xx represents the lead-time variance in hours. When evaluating the formula for a variance of x=2x = -2, a teammate incorrectly states that evaluating the middle term 5x-5x results in -10. Recall the mathematical rule for multiplying two negative numbers, and explain why your teammate is incorrect and what the correct value of the term should be.

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Updated 2026-06-01

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