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=  9*5/3=  3*5=15

Answer 2

a = 9
b + c = 25

$\frac{ab+ac}{15}= \frac{a(b+c)}{15}= \frac{9*25}{15}= \frac{225}{15}= \frac{ 15^{2} }{15^{1}}= 15^{2-1}= 15^{1}=15$