(2x^2-18)/(4-4x+x^2)/[(x+3)*(3-x)/(x^2-2x-3)]
=2(x+3)（x-3)/(x-2)^2*(x-3)(x+1)/(x+3)(3-x)
=-2(x-3)(x+1)/(x-2)^2
谢谢,请快一点! (2x^2-18)/(4-4x+x^2)/[(x+3)*(3-x)/(x^2-2x-3)]
谢谢,请快一点! (2x^2-18)/(4-4x+x^2)/[(x+3)*(3-x)/(x^2-2x-3)]
数学人气：480 ℃时间：2020-05-10 21:06:20
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