Mathematics, 20.09.2019 22:40, puchie1225

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 –(x2 – x + 8).
determine whether (–x)2 – (–x) + 8 is equivalent to –(x2 – x + 8).

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