Question

Stiind ca a*b+a*c egal 321 calculeaza 3*a*(b+c)

Answer 1

a*b+a*c=a*(b+c)=321. Atunci: 3*a*(b+c)=3*321=963

Answer 2

$\rm a\cdot b+a\cdot c=321 \\ Dam~factor~comun~pe~a: \\ a(b+c)=321 \\ 3\cdot a(b+c)=3\cdot 321 \\ \\ \bold{3\cdot a\cdot (b+c)=963}$