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關於3xy22的百科

化簡求值:2x2y﹣[3xy2+2(xy2+2x2y)],其中x=,y=﹣2.
2x2y﹣[3xy2+2(xy2+2x2y)],其中x=,y=﹣2.
  • 2x2y﹣[3xy2+2(xy2+2x2y)],其中x=,y=﹣2.

  • 問題詳情:2x2y﹣[3xy2+2(xy2+2x2y)],其中x=,y=﹣2.【回答】2x2y﹣[3xy2+2(xy2+2x2y)]=2x2y﹣3xy2﹣2xy2﹣4x2y=﹣2x2y﹣5xy2,當x=,y=﹣2時,原式=﹣2×()2×(﹣2)﹣5××(﹣2)=﹣9.知識點:整式的加減題型:計算題...
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