OG详解-OG6 数学2 Q8

Choice B is correct. Since x³ is a common factor of each term in the given expression, the expression can be rewritten as x³ (5x² -6x+8) .
Choice A is incorrect. This expression is equivalent to 5x⁵ - 6x⁴. Choice C is incorrect. This expression is equivalent to 40x⁵ - 48x⁴ + 8x³. Choice D is incorrect. This expression is equivalent to -36x⁹ + 48x⁸ + 6x⁵ .