Short Answer

HVAC Pressure Variance Analysis

A facility maintenance manager is evaluating the net pressure change in an HVAC system across three zones, represented by the expression 25n65n+45n2\sqrt{5n} - 6\sqrt{5n} + 4\sqrt{5n}. Based on the rules for combining like radicals, state the final simplified value of this expression and briefly identify the mathematical reason why the radical term is eliminated in the result.

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Updated 2026-04-18

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