Question

calculati ab-ac stiind ca a=7 si b-c=100 va rog chiar am nevoie dau corona​

Answer 1

b,c apartine R
Putem sa dam valori b= 200 iar c=100 atunci 200-100=100
7*200-7*100=700

Answer 2

$\it ab-ac=a\cdot(b-c) = 7\cdot 100=700$