Try It 7.60: Simplifying Using the LCD
To simplify the complex rational expression using the least common denominator (LCD) method:
Step 1. Find the LCD of all inner fractions. The inner denominators are , , and . Recognize that is a difference of squares: . Since this already contains the other two denominators as factors, the LCD is .
Step 2. Multiply the numerator and denominator by the LCD, .
Step 3. Simplify by canceling common factors in each term.
Step 4. Distribute and combine like terms in the numerator and denominator. Numerator: Denominator:
The simplified expression is .
0
1
Tags
OpenStax
Intermediate Algebra @ OpenStax
Ch.7 Rational Expressions and Functions - Intermediate Algebra @ OpenStax
Algebra
Related
Simplifying Using the LCD
Simplifying Using the LCD
Simplifying Using the LCD
Simplifying Using the LCD
Simplifying Using the LCD
A project manager is calculating the efficiency ratio of two different heating systems, which results in a complex rational expression (a fraction containing other fractions). To simplify this ratio using the Least Common Denominator (LCD) method, arrange the following steps in the correct sequence.
A civil engineer is determining the flow rate of a drainage system using a formula that is structured as a fraction containing other fractions within its numerator and denominator. After identifying the Least Common Denominator (LCD) of all these internal fractions, what is the next step in the simplification process?
A logistics analyst is simplifying a complex rational expression representing a shipping cost-per-unit formula. According to the LCD method, the analyst must multiply both the overall numerator and the overall denominator by the ________ of all individual fractions within the expression to clear the nested denominators.
An efficiency analyst is simplifying a complex rational expression representing a manufacturing workflow. True or False: The primary advantage of the LCD method is that it eliminates all internal (nested) fractions in a single multiplication step, rather than requiring the analyst to first consolidate the numerator and denominator into single fractions.
A data analyst is standardizing a 'Resource Efficiency Ratio' formula that is currently structured as a complex rational expression (a fraction containing other fractions). To simplify this formula using the Least Common Denominator (LCD) method, match each procedural step with its correct description.
Identifying the Scope of the Least Common Denominator
Standardizing the Logistics Efficiency Formula
Documenting the LCD Method for Efficiency Ratios
A financial auditor is simplifying a 'Net Interest Margin' formula that is structured as a complex rational expression (a fraction containing other fractions). According to the procedural steps of the LCD method, which specific parts of the formula must be multiplied by the Least Common Denominator (LCD)?
A logistics coordinator is simplifying a complex ratio for 'Transport Efficiency' that contains several nested fractions. When applying the LCD method, which specific mathematical property of the Least Common Denominator (LCD) ensures that all nested fractions are cleared in a single multiplication step?
Try It 7.55: Simplifying Using the LCD
Try It 7.56: Simplifying Using the LCD
Try It 7.57: Simplifying Using the LCD
Try It 7.58: Simplifying Using the LCD
Try It 7.59: Simplifying Using the LCD
Try It 7.60: Simplifying Using the LCD
Try It 7.61: Simplifying Using the LCD