Mathematics, 31.10.2019 02:31, 2021danaejalang

Which statement best describes how to determine whether f(x) = x2 - x + 8 is an even function?
determine whether -x2 - (-x) + 8 is equivalent to x2 -- x + 8.
determine whether (-x)2 – ( x) + 8 is equivalent to x2 - x + 8.
determine whether -x2 - (-x) + 8 is equivalent to - x + 8).
determine whether (-x)2 -(x) + 8 is equivalent to - x + 8).

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Which statement best describes how to determine whether f(x) = x2 - x + 8 is an even function?