1.用竖式计算(3x^4-5x^3+x^2+2)/(x^2+3) 2.计算(2x^3-x^2y+3y^3)(3x^2-2xy+2y^2)顺便看看x^3+ax^2+bx+8有两个因式x+1和x+2,则a+b=?
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![1.用竖式计算(3x^4-5x^3+x^2+2)/(x^2+3) 2.计算(2x^3-x^2y+3y^3)(3x^2-2xy+2y^2)顺便看看x^3+ax^2+bx+8有两个因式x+1和x+2,则a+b=?](/uploads/image/z/634986-18-6.jpg?t=1.%E7%94%A8%E7%AB%96%E5%BC%8F%E8%AE%A1%E7%AE%97%EF%BC%883x%5E4-5x%5E3%2Bx%5E2%2B2%29%2F%28x%5E2%2B3%29+2.%E8%AE%A1%E7%AE%97%EF%BC%882x%5E3-x%5E2y%2B3y%5E3%29%283x%5E2-2xy%2B2y%5E2%29%E9%A1%BA%E4%BE%BF%E7%9C%8B%E7%9C%8Bx%5E3%2Bax%5E2%2Bbx%2B8%E6%9C%89%E4%B8%A4%E4%B8%AA%E5%9B%A0%E5%BC%8Fx%2B1%E5%92%8Cx%2B2%2C%E5%88%99a%2Bb%3D%EF%BC%9F)
1.用竖式计算(3x^4-5x^3+x^2+2)/(x^2+3) 2.计算(2x^3-x^2y+3y^3)(3x^2-2xy+2y^2)顺便看看x^3+ax^2+bx+8有两个因式x+1和x+2,则a+b=?
1.用竖式计算(3x^4-5x^3+x^2+2)/(x^2+3) 2.计算(2x^3-x^2y+3y^3)(3x^2-2xy+2y^2)
顺便看看x^3+ax^2+bx+8有两个因式x+1和x+2,则a+b=?
1.用竖式计算(3x^4-5x^3+x^2+2)/(x^2+3) 2.计算(2x^3-x^2y+3y^3)(3x^2-2xy+2y^2)顺便看看x^3+ax^2+bx+8有两个因式x+1和x+2,则a+b=?
a=7 b=14 a+b=21
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