合并下列同类项.xy^2-1/5xy^2-3x^2y+2x^2y+3xy^2-2xy^24a^2+3b^2+2ab-4a^2-4b^22.问多项式2x^2-5x+x^2+4x-3x^2-2值是多少,x=1/23.问多项式3a+abc-1/3c^2-3a+1/3c^2值是多少,a=-1/6,b=2,c=-34.水库中水位第一天连续下降3a小时,每
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![合并下列同类项.xy^2-1/5xy^2-3x^2y+2x^2y+3xy^2-2xy^24a^2+3b^2+2ab-4a^2-4b^22.问多项式2x^2-5x+x^2+4x-3x^2-2值是多少,x=1/23.问多项式3a+abc-1/3c^2-3a+1/3c^2值是多少,a=-1/6,b=2,c=-34.水库中水位第一天连续下降3a小时,每](/uploads/image/z/5177282-50-2.jpg?t=%E5%90%88%E5%B9%B6%E4%B8%8B%E5%88%97%E5%90%8C%E7%B1%BB%E9%A1%B9.xy%5E2-1%2F5xy%5E2-3x%5E2y%2B2x%5E2y%2B3xy%5E2-2xy%5E24a%5E2%2B3b%5E2%2B2ab-4a%5E2-4b%5E22.%E9%97%AE%E5%A4%9A%E9%A1%B9%E5%BC%8F2x%5E2-5x%2Bx%5E2%2B4x-3x%5E2-2%E5%80%BC%E6%98%AF%E5%A4%9A%E5%B0%91%2Cx%3D1%2F23.%E9%97%AE%E5%A4%9A%E9%A1%B9%E5%BC%8F3a%2Babc-1%2F3c%5E2-3a%2B1%2F3c%5E2%E5%80%BC%E6%98%AF%E5%A4%9A%E5%B0%91%2Ca%3D-1%2F6%2Cb%3D2%2Cc%3D-34.%E6%B0%B4%E5%BA%93%E4%B8%AD%E6%B0%B4%E4%BD%8D%E7%AC%AC%E4%B8%80%E5%A4%A9%E8%BF%9E%E7%BB%AD%E4%B8%8B%E9%99%8D3a%E5%B0%8F%E6%97%B6%2C%E6%AF%8F)
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