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Exercitiul 2 si 3 va roggg coroanaaa!!!! Repede

Exercitiul 2 Si 3 Va Roggg Coroanaaa Repede class=

Răspuns :

Ex 2.
a+b=8
b+c=10
a+c=12
2a+2b+2c=8+10+12
2(a+b+c)=30
a+b+c=15 (30:2)
(a+b) 8+c=15
c=7
b+c=10
b=3 (10-7)
a+c=12
a=5 (12-7)
Proba: a+b=8
5+3=8
b+c=10
3+7=1p
a+c=12
5+7=12
2)
(2+radical din3+-radical din3):2=4:2=2