Add or Subtract the Radical Expressions

question 29

Essay

Add or subtract the radical expressions. Assume that all variables under radicals represent positive values. Simplify your answer.

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Definitions:

Reliability

How much a testing tool generates consistent and stable outputs over various times.

Validity

Refers to the extent to which a concept, conclusion or measurement is well-founded and likely corresponds accurately to the real world.

Accuracy

The degree to which a measurement or estimation matches the true value or standard.

Reliability

The degree to which an assessment tool produces stable and consistent results over multiple measurements.