通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x²-1,2x/x²-3x+2
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通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x²-1,2x/x²-3x+2通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x
通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x²-1,2x/x²-3x+2
通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x²-1,2x/x²-3x+2
通分:(1)1/(2-x)²,x/(x+2)(x-2)(2)1/x²-1,2x/x²-3x+2
1﹚
1/﹙2-x﹚²=1/﹙x-2﹚²=﹙x+2﹚/[﹙x-2﹚²﹙x+2﹚]
1/[﹙x+2﹚﹙x-2﹚]=﹙x-2﹚/[﹙x-2﹚²﹙x+2﹚]
2﹚
1/﹙x²-1﹚=1/[﹙x+1﹚﹙x-1﹚]=﹙x-2﹚/[﹙x+1﹚﹙x-1﹚﹙x-2﹚]
2x/﹙x²-3x+2﹚=2x/[﹙x-1﹚﹙x-2﹚]=2x﹙x+1﹚/[﹙x+1﹚﹙x-1﹚﹙x-2﹚]
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