Răspuns :

Dianageorgiana794id

Răspuns:

a) ab+ac= a·(b+c)= 6·157=942

b) a·b-a·c= a·(b-c)= 25·147=3675

c) ab+ac+ad= a·(b+c+d)= 14·59=826

d) ab-ac+ad=a(b-c+d)=10·100=1000

e) ab-ac-ad=a(b-c-d)=7·13=91

se da factor comun a

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