(a+b+c)(a-b-c)=[a+( )][a-( )] (x-1)(x^2+1)( )=x^4-1填空
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![(a+b+c)(a-b-c)=[a+( )][a-( )] (x-1)(x^2+1)( )=x^4-1填空](/uploads/image/z/13963836-12-6.jpg?t=%28a%2Bb%2Bc%EF%BC%89%EF%BC%88a-b-c%EF%BC%89%3D%5Ba%2B%EF%BC%88+%EF%BC%89%5D%5Ba-%EF%BC%88+%EF%BC%89%5D+%28x-1%EF%BC%89%EF%BC%88x%5E2%2B1%EF%BC%89%EF%BC%88+%EF%BC%89%3Dx%5E4-1%E5%A1%AB%E7%A9%BA)
(a+b+c)(a-b-c)=[a+( )][a-( )] (x-1)(x^2+1)( )=x^4-1填空
(a+b+c)(a-b-c)=[a+( )][a-( )] (x-1)(x^2+1)( )=x^4-1填空
(a+b+c)(a-b-c)=[a+( )][a-( )] (x-1)(x^2+1)( )=x^4-1填空
(a+b+c)(a-b-c)=[a+(b+c )][a-(b+c )]
(x-1)(x^2+1)(x+1 )=x^4-1