化简 2/3X*(根号9X-X^2)*(根号1/X立方)+(6X*根号X/4)

问题描述:

化简 2/3X*(根号9X-X^2)*(根号1/X立方)+(6X*根号X/4)

根号下大于等于0
9x-x²>=0
x²-9x