计算:a(a-b)^2-2b(a-b)(a+b)如题,

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计算:a(a-b)^2-2b(a-b)(a+b)如题,计算:a(a-b)^2-2b(a-b)(a+b)如题,计算:a(a-b)^2-2b(a-b)(a+b)如题,a(a-b)²-2b(a-b

计算:a(a-b)^2-2b(a-b)(a+b)如题,
计算:a(a-b)^2-2b(a-b)(a+b)
如题,

计算:a(a-b)^2-2b(a-b)(a+b)如题,
a(a-b)²-2b(a-b)(a+b)
=a(a²-2ab+b²)-2b(a²-b²)
=a³-2a²b+ab²-2a²b+2b³
=a³-4a²b+ab²+2b³