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Simplifying f(-4) + f(4) = 0 Reorder the terms for easier multiplication: -4f + f(4) = 0 Reorder the terms for easier multiplication: -4f + 4f = 0 Combine like terms: -4f + 4f = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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