Question

se stie ca x-y=12si z=10 calculati xz-yz

Answer 1

ai x-y=12
z = 10
dai factor comun xz-yz = z(x-y) = 10*12 = 120

Answer 2

x-y=12 si z=10
Inmultim prima relatie cu z:

z(x-y)=12 * 10 
xz-yz = 120

Semnul * inseamna inmultire