Example

Multiplying f(x)=x−5f(x) = x - 5 and g(x)=x2−2x+3g(x) = x^2 - 2x + 3

To find the product function (f⋅g)(x)(f \cdot g)(x) for f(x)=x−5f(x) = x - 5 and g(x)=x2−2x+3g(x) = x^2 - 2x + 3, substitute the expressions into the formula (f⋅g)(x)=f(x)⋅g(x)(f \cdot g)(x) = f(x) \cdot g(x). Multiplying the polynomials gives (x−5)(x2−2x+3)(x - 5)(x^2 - 2x + 3). Distribute the terms to obtain x3−2x2+3x−5x2+10x−15x^3 - 2x^2 + 3x - 5x^2 + 10x - 15. Combining like terms yields the simplified product function: (f⋅g)(x)=x3−7x2+13x−15(f \cdot g)(x) = x^3 - 7x^2 + 13x - 15.

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Updated 2026-06-04

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