2(a²-ab)/b²-a² 2x³y-4x²y²/2x²-8y²

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2(a²-ab)/b²-a² 2x³y-4x²y²/2x²-8y²
2(a²-ab)/b²-a² 2x³y-4x²y²/2x²-8y²

2(a²-ab)/b²-a² 2x³y-4x²y²/2x²-8y²
2(a²-ab)/b²-a²
=2a(a-b)/(b-a)(b+a)
=-2a/(a+b)
2x³y-4x²y²/2x²-8y²
=2x²y(x-2y)/2(x-2y)(x+2y)
=x²y/(x+2y)