[x-1/(x^2-3x+2)]-[(x+1)/(x^2+3x+2)]-[(x^2)/(x^2-4)]求解答

来源：学生作业帮编辑：神马作文网作业帮分类：数学作业时间：2024/11/06 23:28:13

=(x-1)/(x-2)(x-1)-(x+1)/(x+2)(x+1)-x²/(x+2)(x-2)
=1/(x-2)-1/(x+2)-x²/(x+2)(x-2)
=(x+2-x+2-x²)/(x+2)(x-2)
=(4-x²)/(x²-4)
=-1

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