2x-y分之y乘根号y分之4x立方y-4x²y²+xy立方

问题描述:

2x-y分之y乘根号y分之4x立方y-4x²y²+xy立方

2x-y分之y乘根号y分之4x立方y-4x²y²+xy立方
=√4x³-4x²y+xy² /(2x-y)
=√x(2x-y)²/(2x-y)
=√x