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Answers by Dan H.

simplify this: (answer)

Use PEMDAS.  What's in the Parentheses cannot be combined in this case, because they are not like terms.  So, execute the Exponent.  Squaring yields 16 - 8√3 + 3.  No Multiply or Divide, so it's time to Add or Subtract.  Final answer: 19 - 8√3   Follow PEMDAS...