Algebra-1

Question Analysis
This question tests the student's understanding that the domain of any quadratic function is always all real numbers, regardless of the values of , , and .

Key Concept Explanation
The domain of a quadratic function is the set of all possible input values (independent variable ) for which the function is defined. For all quadratic functions, the domain includes all real numbers because there are no restrictions on the value of in expressions of the form

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