Question

Calculati (ab+ac)/15 ,stiind ca a=9 si b+c=25

Answer 1

(ab+ac)/15= a(b+c)/15=   9*25/15=  3*25/5=  3*5=15

Answer 2

 (ab+ac)=a(b+c)
=9 x 25
=225

$\frac{225}{15} =15$