(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab
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![(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab](/uploads/image/z/1021519-55-9.jpg?t=%EF%BC%88a%E5%8A%A0b%EF%BC%89%EF%BC%88a%E5%87%8Fb%EF%BC%89%E5%8A%A0%EF%BC%884ab%E7%9A%84%E7%AB%8B%E6%96%B9-8a%E7%9A%84%E5%B9%B3%E6%96%B9b%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%89%E9%99%A4%E4%BB%A54ab)
(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab
(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab
(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab
(a加b)(a减b)加(4ab的立方-8a的平方b的平方)除以4ab
=a²-b²+4ab(b²-2ab)÷4ab
=a²-b²+b²-2ab
=a²-2ab
(a+b)(a-b)+(4ab³-8a²b²)/4ab
=(a²-b²)+[4ab(b²-2ab)/4ab]
=(a²-b²)+(b²-2ab)
=(a²-b²)+(b²-2ab)
=a²-b²+b²-2ab
=a²-2ab
=a(a-2b)