Question

se considera numerele reale a si b astfel incat 2a +2b =12. determinati: a+b ; 3a +3b; 11a +11b; -a-b; -4a -4b​

Answer 1

Răspuns:

2a +2b =12/:2

a+b=6

3a+3b <=> 3(a+b) <=> 3*6=18    (procedezi la fel si la 11a+11b)

a+b=6 /*(-1)

-a-b=-6

-4a-4b <=> (-a-b)*4 <=> -6*4=-24