If f(x) = x² - 4 then f(- x) - f(x) equals?
- 4x
- 0
- 8x
- None of these
Explanation
f(x) = x² - 4
f(-x) = (-x)² - 4 = x² - 4
f(-x) - f(x) = (x² - 4) - (x² - 4) = 0
Last verified on 06-05-2026
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