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3-92.

For each expression below, write a simpler, equivalent expression using only positive exponents.

  1.  

  • When multiplying like terms, add the exponents.

  1.  

  • Follow the steps in part (a).

  1.  

  • When dividing like terms, subtract the exponents.

  1.  

  • Write the expression three times and then follow the steps in part (a).