Which Method Should Be Used to Solve the System? Explain

question 3

Essay

Which method should be used to solve the system? Explain your answer, including a description of the first step.
-x² + 9y² = 9
7x² + 8y² = 81

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Definitions:

Categorical

Refers to variables that represent types of data which may be divided into groups.

Sample

A subset of individuals or items selected from a larger population for the purpose of statistical analysis.

Represent

To symbolize or stand in for something, especially in the context of data or statistical analysis.

Whole

A term often used in mathematics and statistics to represent an entire data set or population.