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A systems analyst is verifying the factored form (q+3)(q−5)(q + 3)(q - 5) for a data model represented by the expression q2−2q−15q^2 - 2q - 15. To confirm the result, the analyst multiplies the binomials to get the intermediate expression q2−5q+3q−15q^2 - 5q + 3q - 15. The sum of the two middle terms, −5q-5q and 3q3q, is ____.

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Updated 2026-09-18

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