Essay

Recalling the Solution Process for a Machinery Efficiency Model

A Quality Control Associate is documenting the safety parameters of a production line. The machine's optimal operating range xx (in hours) is modeled by the rational inequality 12+4x2<3x\frac{1}{2} + \frac{4}{x^2} < \frac{3}{x}. To verify the system's compliance, the associate must reproduce the standard algebraic solution process taught in their technical training.

Write an essay that recalls and explains the step-by-step algebraic procedure to solve this specific rational inequality. Your essay must describe each of the following components in detail:

  1. Moving all terms to one side of the inequality to obtain a zero on the right side.
  2. Finding the Least Common Denominator (LCD) of the fractions and combining them into a single rational expression.
  3. Factoring the numerator of the combined rational expression.
  4. Identifying all the zero partition numbers by setting both the numerator and denominator to zero.
  5. Defining the four distinct test intervals on the number line created by these partition numbers.
  6. Stating the final solution set in interval notation and explaining why the partition numbers are excluded.

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Updated 2026-06-18

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