Write the Word or Phrase That Best Completes Each Statement $$5 \sqrt { 605 } - 2 \sqrt { 28 } + ( ? ) = 52 \sqrt { 5 } + 11 \sqrt { 7 }$$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
- $$5 \sqrt { 605 } - 2 \sqrt { 28 } + ( ? ) = 52 \sqrt { 5 } + 11 \sqrt { 7 }$$