(x-3/x^2+3x+2)*(x^2/x^2-4x+3)化简

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(x-3/x^2+3x+2)*(x^2/x^2-4x+3)化简
(x-3/x^2+3x+2)*(x^2/x^2-4x+3)化简

(x-3/x^2+3x+2)*(x^2/x^2-4x+3)化简
[(x-3)/(x²+3x+2)][x²/(x²-4x+3)]
=[(x-3)/(x+1)(x+2)][x²/(x-1)(x-3)]
=x²/[(x+1)(x-1)(x+2)]
.

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