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题目来源：
OG详解-OG7 数学2 Q9
正确答案：C
题目详解
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Choice C is correct. Since x is a common factor of each term in the given expression, the given expression can be rewritten as x(23x2 +2x+9).
Choice A is incorrect. This expression is equivalent to 23x3 +46x2 +207x. Choice B is incorrect. This expression is equivalent to 207x4 +18x3 +9x. Choice D is incorrect. This expression is equivalent to 34x3 +34x2 +34x.
Choice A is incorrect. This expression is equivalent to 23x3 +46x2 +207x. Choice B is incorrect. This expression is equivalent to 207x4 +18x3 +9x. Choice D is incorrect. This expression is equivalent to 34x3 +34x2 +34x.
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