先化简,再求值;4-x/x-2除以(x+2-(12/x-2))其中x=根号下3,-4
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![先化简,再求值;4-x/x-2除以(x+2-(12/x-2))其中x=根号下3,-4](/uploads/image/z/596354-50-4.jpg?t=%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%86%8D%E6%B1%82%E5%80%BC%EF%BC%9B4-x%2Fx-2%E9%99%A4%E4%BB%A5%EF%BC%88x%2B2-%2812%2Fx-2%29%EF%BC%89%E5%85%B6%E4%B8%ADx%3D%E6%A0%B9%E5%8F%B7%E4%B8%8B3%2C-4)
先化简,再求值;4-x/x-2除以(x+2-(12/x-2))其中x=根号下3,-4
先化简,再求值;4-x/x-2除以(x+2-(12/x-2))其中x=根号下3,-4
先化简,再求值;4-x/x-2除以(x+2-(12/x-2))其中x=根号下3,-4
4-x/x-2除以(x+2-(12/x-2))
=4-x/x-2除以((x^2-4-12)/(x-2))
=-(x-4)/(x-2) *(x-2)/(x+4)(x-4)
=-1/(x+4)
=-1/(√3-4+4)
=-√3/3