Given f(x) = x³ + x² − x, what is f(4)?
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} Ask Algebra House
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