运用平方差公式计算(2x1)(2x+1)

____洛小柒° 2023-03-18 13:35

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  ___Aueey

  2023-03-18 13:54

  (2x-1)(2x+1) =(2x)²-1=4x²-1(1/2a-2b)(1/2a+2b)=(1/2a)²-(2b)²=1/4a²-4b²(5m+3n)(3n-5m)=(3n)²-(5m)²=9n²-25m²(-x+y)(-x-y)=(-x)²-y²=x²-y²...
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