Identifying $\sqrt{-169}$ and $-\sqrt{64}$ as Real or Not Real

A quality control technician is auditing a spreadsheet for errors. Which of the following expressions must be flagged as 'not a real number'?

A quality control technician is auditing a spreadsheet for errors. Which of the following expressions must be flagged as 'not a real number'?

A quality control technician is auditing a spreadsheet and finds the expression 'the square root of -49'. Because no real number multiplied by itself results in a negative product, the technician should classify this as 'not a ____ number'.

A data integrity auditor is reviewing a series of mathematical outputs in a financial spreadsheet. To ensure the system is processing values correctly, match each expression with the correct classification based on the properties of real numbers.

A software developer is building a mathematical validation filter for a spreadsheet application that only accepts real numbers. If a user enters the expression $\sqrt{-64}$, the system should identify this as a valid real number. True or False?

Data Validation: Identifying Non-Real Outputs

Financial Software Data Validation

A technical writer is creating a logic manual for a new spreadsheet application's error-handling module. Arrange the following steps in the correct logical sequence to explain the mathematical rule for why $\sqrt{-25}$ is classified as 'not a real number'.

Technical Support Documentation: Real Number Logic

A technical writer is updating the 'Error Codes' section of a spreadsheet software manual. When a user enters a formula like $\sqrt{-49}$, the software displays an error message: 'Result is Not a Real Number.' Which of the following mathematical principles should the manual cite to explain this error?