x+2/x-3乘x^2-6x+9/x^2-4
问题描述：
x+2/x-3乘x^2-6x+9/x^2-4
答
(x+2)/(x-3)×(x²-6x+9)/(x²-4)
=(x+2)/(x-3)×[(x-3)²]/[(x+2)(x-2)]
=(x-3)/(x-2)
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