数学整式计算题完全平方差

0东京泰迪熊0 2023-03-16 22:09

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  ∩_∩泡泡

  2023-03-16 22:26

  5x(x-1)-(x-2)^2-(2x+3)(2x-3)=5x²-5x-x²-4+4x-4x²+9=-x+5

  5x(x-1)-(x-2)^2-(2x+3)(2x-3)=5x²-5x-(x²-4x+4)-(4x²-9)=-x+5
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