Question

Daca ab+ac= -52 si b+c= -13 , calculati a
!!!!Am nevoie urgeeentt!!!!

Answer 1

ab+ac=-52    a(b+c)=-52    a*(-13)=-52 
b+c=-13
a  =(-52)/(-13)
a=4

Answer 2

a(b-c)=-52
a*(-13)=-52
a=52/13