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7-75.

Jack and Jill were working on simplifying the expression at right, but they were having some trouble. Then Jill had an idea.

“Can’t we separate the parts?” she said. “That way, it might be easier to tell what we can simplify.” She rewrote the expression as shown at right.


“Okay,” said Jack. “Now we can rewrite each of the parts with negative exponents and simplify.” Homework Help ✎

  1. Help Jack and Jill finish simplifying their expression.

  2. Use their idea to rewrite and simplify .