数学整式加减 试说明不论x取任何值,代数式 (x^3+5x^2+4x-1)-(-x^2-3x+2x^3-3)+(8-7x-6x^2+x^3)的值恒不变如果2mx^ay与-5nx^2a-3y,是关于的单项式,且它们是同类项。求(4a-13)^2009的值若2mx^ay+5nx^2a-3y=0,且x
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![数学整式加减 试说明不论x取任何值,代数式 (x^3+5x^2+4x-1)-(-x^2-3x+2x^3-3)+(8-7x-6x^2+x^3)的值恒不变如果2mx^ay与-5nx^2a-3y,是关于的单项式,且它们是同类项。求(4a-13)^2009的值若2mx^ay+5nx^2a-3y=0,且x](/uploads/image/z/469393-25-3.jpg?t=%E6%95%B0%E5%AD%A6%E6%95%B4%E5%BC%8F%E5%8A%A0%E5%87%8F+%E8%AF%95%E8%AF%B4%E6%98%8E%E4%B8%8D%E8%AE%BAx%E5%8F%96%E4%BB%BB%E4%BD%95%E5%80%BC%2C%E4%BB%A3%E6%95%B0%E5%BC%8F+%28x%5E3%2B5x%5E2%2B4x-1%29-%28-x%5E2-3x%2B2x%5E3-3%29%2B%EF%BC%888-7x-6x%5E2%2Bx%5E3%29%E7%9A%84%E5%80%BC%E6%81%92%E4%B8%8D%E5%8F%98%E5%A6%82%E6%9E%9C2mx%5Eay%E4%B8%8E-5nx%5E2a-3y%2C%E6%98%AF%E5%85%B3%E4%BA%8E%E7%9A%84%E5%8D%95%E9%A1%B9%E5%BC%8F%EF%BC%8C%E4%B8%94%E5%AE%83%E4%BB%AC%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9%E3%80%82%E6%B1%82%EF%BC%884a-13%EF%BC%89%5E2009%E7%9A%84%E5%80%BC%E8%8B%A52mx%5Eay%2B5nx%5E2a-3y%3D0%EF%BC%8C%E4%B8%94x)
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