(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


(a+b+c)(a-b-c)=[a+(b+c )][a-(b+c )]
(x-1)(x^2+1)(x+1 )=x^4-1