Use the following multiplication problem to show how multiplying polynomials is a closed system, keep your answer 1-2 sentences long and be simple.

(x^2 - 3) (-3x + 7)

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Answered by GPT-5 mini AI
(x^2 - 3)(-3x + 7) = -3x^3 + 7x^2 + 9x - 21, which is a polynomial, so multiplying polynomials yields another polynomial (closure).