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What is the domain of this quadratic function?\newliney=x24y = x^2 - 4\newlineChoices:\newline(A){xx0}\{x | x \geq 0\}\newline(B){xx0}\{x | x \leq 0\}\newline(C){xx4}\{x | x \geq -4\}\newline(D)all real numbers

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Q. What is the domain of this quadratic function?\newliney=x24y = x^2 - 4\newlineChoices:\newline(A){xx0}\{x | x \geq 0\}\newline(B){xx0}\{x | x \leq 0\}\newline(C){xx4}\{x | x \geq -4\}\newline(D)all real numbers
  1. Define Function Domain: The domain of a function refers to all the possible input values (xx-values) that the function can accept. For a quadratic function, which is a polynomial function, the domain is typically all real numbers because you can plug any real number into a quadratic equation and get a real number out.
  2. Check Restrictions: To confirm the domain of the quadratic function y=x24y = x^2 - 4, we need to check if there are any restrictions on the xx-values. Since there are no square roots, logarithms, or denominators that could potentially restrict the domain, we can conclude that xx can take any real value.
  3. Confirm Domain: Therefore, the domain of the function y=x24y = x^2 - 4 is all real numbers, which corresponds to choice (D).

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