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题目来源：
OG详解-OG1 数学1 Q16
正确答案：C
题目详解
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Choice C is correct. Since each term of the given expression has a common factor of 6x2y2, it may be rewritten as 6x2y2（x6）+ 6x2y2（2），6x2y2（x6+2）.
Choice A is incorrect. This expression is equivalent to 12x8y2，not 6x8y2+12x2y2.
Choice B is incorrect. This expression is equivalent to 6x6y2，not 6x8y2+12x2y2.
Choice D is incorrect. This expression is equivalent to 6x6y2+12x2y2，not 6x8y2+12x2y2
Choice A is incorrect. This expression is equivalent to 12x8y2，not 6x8y2+12x2y2.
Choice B is incorrect. This expression is equivalent to 6x6y2，not 6x8y2+12x2y2.
Choice D is incorrect. This expression is equivalent to 6x6y2+12x2y2，not 6x8y2+12x2y2
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