а)25^2 -1= 624
б) 95^2 -1= 855624
в)( 95+2)(95-2)=95^2 -4=855621
г) (25+3)(25-3)=25^2 - 9=616
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а)25^2 -1= 624
б) 95^2 -1= 855624
в)( 95+2)(95-2)=95^2 -4=855621
г) (25+3)(25-3)=25^2 - 9=616