OG详解-OG5 数学2 Q4

Choice B is correct. Since 2xy is a common factor of each term in the given expression, the expression can be rewritten as 2xy (8x²y+7).
Choice A is incorrect. This expression is equivalent to 16x²y² +14xy. Choice C is incorrect. This expression is equivalent to 28x³y² +14xy. Choice D is incorrect. This expression is equivalent to 112x³ y² +14xy.