Question

a•b=2supra15 și a•c=11supra75 calculați a•(b+c)

Answer 1

$a(b+c)=ab+ac= \frac{2}{15}+ \frac{11}{75}= \frac{10}{75}+ \frac{11}{75}= \frac{21}{75}= \frac{7}{25}.$

Answer 2

a·(b+c)=a·b+a·c=ab+ac=2/15+11/75=(10+11)/75=21/75=7/25=0,28