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Vreau doar formula la 2

Vreau Doar Formula La 2 class=

Răspuns :

abc=ab+bc+ca (cu linie deasupra)
100a+10b+c=10a+b+10b+c+10c+a 100a+10b+c=11a+11b+11c 100a+10b+c=11×(a+b+c)