Question

daca a*b= -2/5 si a*c=1/3 , atunci:
a) a*(b+c)=........
b) a*(b-c)=........

Answer 1

a) a*(b+c) = a*b + a*c = -2/5 + 1/3 = 0,0(6)
b) a*(b-c) = a*b - a*c = -2/5 - 1/3 = 0,7(3)