两道数学题目(有关于分式的计算)急!先约分,再求值.1,-x^4+2x^2y^2-y^4分之x^3-x^2y-xy^2+y^3 其中x=0.5,y=0.752,x^2+1-2x分之x^3-x^2-x+1 其中x=10^2008-1我要核对一下我所做的!加油``````
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![两道数学题目(有关于分式的计算)急!先约分,再求值.1,-x^4+2x^2y^2-y^4分之x^3-x^2y-xy^2+y^3 其中x=0.5,y=0.752,x^2+1-2x分之x^3-x^2-x+1 其中x=10^2008-1我要核对一下我所做的!加油``````](/uploads/image/z/1752146-26-6.jpg?t=%E4%B8%A4%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%98%E7%9B%AE%28%E6%9C%89%E5%85%B3%E4%BA%8E%E5%88%86%E5%BC%8F%E7%9A%84%E8%AE%A1%E7%AE%97%29%E6%80%A5%21%E5%85%88%E7%BA%A6%E5%88%86%2C%E5%86%8D%E6%B1%82%E5%80%BC.1%2C-x%5E4%2B2x%5E2y%5E2-y%5E4%E5%88%86%E4%B9%8Bx%5E3-x%5E2y-xy%5E2%2By%5E3+%E5%85%B6%E4%B8%ADx%3D0.5%2Cy%3D0.752%2Cx%5E2%2B1-2x%E5%88%86%E4%B9%8Bx%5E3-x%5E2-x%2B1+%E5%85%B6%E4%B8%ADx%3D10%5E2008-1%E6%88%91%E8%A6%81%E6%A0%B8%E5%AF%B9%E4%B8%80%E4%B8%8B%E6%88%91%E6%89%80%E5%81%9A%E7%9A%84%21%E5%8A%A0%E6%B2%B9%60%60%60%60%60%60)
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