化简.快-8x^3y/12xy^27(a-b)^3/14(b-a)^2x-x^2/x^2-2x+1

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化简.快-8x^3y/12xy^27(a-b)^3/14(b-a)^2x-x^2/x^2-2x+1
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化简.快-8x^3y/12xy^27(a-b)^3/14(b-a)^2x-x^2/x^2-2x+1
化简.快
-8x^3y/12xy^2
7(a-b)^3/14(b-a)^2
x-x^2/x^2-2x+1

化简.快-8x^3y/12xy^27(a-b)^3/14(b-a)^2x-x^2/x^2-2x+1
—8x³y/12xy²
=—8X²/12y
=—2X²/3y
7(a-b)³/14(b-a)²
=7(a-b)³/14(a-b)²
=a—b/2
x-x²/x²-2x+1
=X(X—1)/(X—1)²
=X/X—1