Find each sum.(3n2 – 5n + 6) + (–8n2 – 3n – 2) =

Combine like terms: the squared terms give 3n² − 8n² = −5n², and the linear terms give −5n − 3n = −8n. The constants give 6 − 2 = 4, so the sum is −5n² − 8n + 4, choice C.

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