Evaluate the function

Given f(x) = x³ + x² − x, what is f(4)?

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Substitute 4, in for x, into f(x).

f(4) = 4³ + 4² - 4   {substituted 4, in for x, into f(x)}
=  64 + 16 - 4   {evaluated exponents}
=  76   {added and subtracted}

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