答：1）-2a分之b÷(-4a分之3b)乘(3a分之-2a)=- [ b/(2a) ]*[-4a/(3b) ]*[-2a/(3a)]=-(4/6)*(2/3)=-8/18=-4/92）2x+y分之4x²-4xy+y²÷（4x²-y²）=[(4x²-4xy+y²)/(2x+y) ] / (4x²-...