Multiple Choice

A quality control analyst at a logistics firm is solving the equation x2+10x+4=15x^2 + 10x + 4 = 15 to determine the optimal interval for safety inspections. After reaching the simplified form (x+5)2=36(x + 5)^2 = 36 through a standard procedural model, the analyst must solve for xx. According to the training manual, which mathematical property is required to correctly derive x+5=±6x + 5 = \pm 6?

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Updated 2026-04-21

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