﹙2/5x³-7x²﹢2/3x﹚÷2/3x

问题描述:

﹙2/5x³-7x²﹢2/3x﹚÷2/3x

[(2/5)x³-7x²+(2/3)x]÷(2/3)x
=(3/5)x²-(21/2)x+1