S f (-x) = x^2 - 1 odd, even or neither

f (x) = f (-x) = x^2 - 1 is an even function

Step-by-step explanation:

When f (x) = f (-x), the function is symmetrical about the y-axis. That is the definition of an even function.

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An odd function is symmetrical about the origin: f (x) = - f (-x).