分式的加减 化简4/x-2-x+2/x-2

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分式的加减 化简
4/x-2-x+2/x-2

4/(x-2)-(x+2)/(x-2)
=(4-x-2)/(x-2)
=-(x-2)/(x-2)
=-1

4/(x-2)-(x+2)/(x-2)
=4-(x+2)/(x-2)
=(4-x-2)/(x-2)
=(2-x)/(x-2)
=-(x-2)/(x-2)
=-1