Essay

Rational Expression Subtraction in Quality Control Models

A quality control coordinator at an automotive assembly plant is comparing the hourly efficiency of two robotic arms. The difference in their performance models is represented by the following rational expression:

4x211x+8x23x+23x2+x3x23x+2\frac{4x^2-11x+8}{x^2-3x+2} - \frac{3x^2+x-3}{x^2-3x+2}

To document this analysis in a technical troubleshooting report, the coordinator must outline the exact algebraic steps required to perform this subtraction and simplify the result.

Write an essay that lists and describes the five sequential steps needed to subtract these rational expressions and simplify the result. In your explanation, ensure you:

  1. State the critical rule for handling the subtraction operator in the numerator when first combining the two expressions.
  2. Identify the specific terms in the second numerator that change sign, and show their signs after distribution.
  3. Detail how the resulting numerator and denominator are factored, and recall the rule for simplifying the final fraction.

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Updated 2026-06-18

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