Simon is factoring the polynomial.x2−4x−12(x−6)(x+______)

To get the constant term −12 from (x − 6)(x + ___), the missing number must satisfy −6 × ___ = −12, so it is 2. Checking the middle term gives 2x − 6x = −4x, so the factorization is (x − 6)(x + 2), choice C.

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