Multiple Choice

A data analyst is standardizing two operational formulas, M1 = 8 / (x^2 - 2x - 3) and M2 = 3x / (x^2 + 4x + 3), to share a common denominator of (x + 1)(x - 3)(x + 3). After factoring the denominator of M1 as (x + 1)(x - 3), which factor must be identified as 'missing' to create an equivalent expression with the common denominator?

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Updated 2026-04-06

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