Example

Multiplying f(x)=x−7f(x) = x - 7 and g(x)=x2+8x+4g(x) = x^2 + 8x + 4

To find the product function (f⋅g)(x)(f \cdot g)(x) for f(x)=x−7f(x) = x - 7 and g(x)=x2+8x+4g(x) = x^2 + 8x + 4, use the formula (f⋅g)(x)=f(x)⋅g(x)(f \cdot g)(x) = f(x) \cdot g(x) and multiply the polynomials: (x−7)(x2+8x+4)(x - 7)(x^2 + 8x + 4). Distributing the terms produces x3+8x2+4x−7x2−56x−28x^3 + 8x^2 + 4x - 7x^2 - 56x - 28. Combining like terms simplifies the product to (f⋅g)(x)=x3+x2−52x−28(f \cdot g)(x) = x^3 + x^2 - 52x - 28.

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Updated 2026-06-17

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