1.多项式3x^2-2x+1与-x^2+2x+1的差等于( )

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1.多项式3x^2-2x+1与-x^2+2x+1的差等于()1.多项式3x^2-2x+1与-x^2+2x+1的差等于()1.多项式3x^2-2x+1与-x^2+2x+1的差等于()4x^2-4x4x^

1.多项式3x^2-2x+1与-x^2+2x+1的差等于( )
1.多项式3x^2-2x+1与-x^2+2x+1的差等于( )

1.多项式3x^2-2x+1与-x^2+2x+1的差等于( )
4x^2-4x

4x^2-4x