若多项式3x³-2x²+3x-1与多项式x²-2mx³+2x+3的和为二次三项式,求m的值
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若多项式3x³-2x²+3x-1与多项式x²-2mx³+2x+3的和为二次三项式,求m的值
若多项式3x³-2x²+3x-1与多项式x²-2mx³+2x+3的和为二次三项式,求m的值
若多项式3x³-2x²+3x-1与多项式x²-2mx³+2x+3的和为二次三项式,求m的值