Find the domain of the following rational function. R(x) =8(x²-4x-21)/9(x²-49) Select the correct choice below and fill in any

Question

Find the domain of the following rational function. R(x) =8(x²-4x-21)/9(x²-49) Select the correct choice below and fill in any answer boxes within your choice.  A. The domain of R(x) is {x}. (Type an inequality. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.) B. The domain of R(x) the set of all real numbers.

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