Domains of rational expressions | Mathematics homework help

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x2 + x – 72 
24

5b – 3 
b2 – 4

                                           RATIONAL EXPRESSION 1               RATIONAL EXPRESSION 2

 

In this discussion, you are assigned two rational expressions to work on. Remember to factor all polynomials completely. Read the following instructions in order and view the example attached to complete this discussion.

 

  • Explain in your own words what the meaning of domain is. Also, explain why a denominator cannot be zero.
  • Find the domain for each of your two rational expressions.
  • Write the domain of each rational expression in set notation (as demonstrated in the example).
  • Do both of your rational expressions have excluded values in their domains? If yes, explain why they are to be excluded from the domains. If no, explain why no exclusions are necessary.
  • Incorporate the following five math vocabulary words into your discussion. Use bold font to emphasize the words in your writing. Do not write definitions for the words; use them appropriately in sentences describing your math work.
    • Domain
    • Excluded value
    • Set
    • Factor
    • Real numbers

Your initial post should be at least 250 words in length. Support your claims with examples from required material(s) and/or other scholarly resources, and properly cite any references.  Please use the reference below:

 

  • Dugopolski, M. (2012). Elementary and intermediate algebra (4th ed.). New York, NY: McGraw-Hill Publishing.
    • This text is available as an eBook in your online classroom and through the ALEKS Math Lab.  Note: Students must complete the initial ALEKS assessment to access the text via ALEKS software.

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