整式运算(a-1)(a+1)(a²+1) (-3ab²+2a²b)(3ab²+2a²b) (1-xy)(-xy-1)
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![整式运算(a-1)(a+1)(a²+1) (-3ab²+2a²b)(3ab²+2a²b) (1-xy)(-xy-1)](/uploads/image/z/4335274-10-4.jpg?t=%E6%95%B4%E5%BC%8F%E8%BF%90%E7%AE%97%28a-1%29%28a%2B1%29%28a%26%23178%3B%2B1%29+%28-3ab%26%23178%3B%2B2a%26%23178%3Bb%29%EF%BC%883ab%26%23178%3B%2B2a%26%23178%3Bb%EF%BC%89+%EF%BC%881-xy%EF%BC%89%EF%BC%88-xy-1%EF%BC%89)
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整式运算(a-1)(a+1)(a²+1) (-3ab²+2a²b)(3ab²+2a²b) (1-xy)(-xy-1)
整式运算(a-1)(a+1)(a²+1) (-3ab²+2a²b)(3ab²+2a²b) (1-xy)(-xy-1)
整式运算(a-1)(a+1)(a²+1) (-3ab²+2a²b)(3ab²+2a²b) (1-xy)(-xy-1)
(a-1)(a+1)(a²+1)
=(a²-1)(a²+1)
=a^4-1
(-3ab²+2a²b)(3ab²+2a²b)
=4a^4b²-9a²b^4
(1-xy)(-xy-1)
=-(1-xy)(1+xy)
=-(1-x²y²)
=x²y²-1
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