约分x³-4xy²/3x³+6x²y

问题描述:

约分x³-4xy²/3x³+6x²y

x³-4xy²/3x³+6x²y
=x(x²-4y²)/[3x²(x+2y)]
=x(x-2y)(x+2y)/[3x²(x+2y)]
=(x-2y)/3x