Răspuns :
a=10
b+c+d=35
a)a(b+c+d) =10x35= 350
b)ab+ac+ad = a(b+c+d) (factor comun) = 10 x 35 = 350
b+c+d=35
a)a(b+c+d) =10x35= 350
b)ab+ac+ad = a(b+c+d) (factor comun) = 10 x 35 = 350