What is the sum of the polynomials?(–x2 + 9) + (–3x2 – 11x + 4)

Combine like terms: the squared terms give −x² − 3x² = −4x², and the linear term is −11x. The constants add to 9 + 4 = 13, so the sum is −4x² − 11x + 13, choice B.

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