Question

Se stie ca a*b=91,iar a*c=260.Caluleaza a*(b+c)*2.
a.169 b.221 c.351 d.702

Answer 1

ab+ac=91+260
a(b+c)=351
a(b+c)*2=351*2=702

Answer 2

   
$a * (b + c)*2 = (a*b + a*c)*2 = (91 + 260)*2 = 351*2 = \boxed{702} \\ Raspuns \;corect:\;\; \boxed{D}$