(1/5a+1/7a)*a^2/4====

Question

(1/5a+1/7a)*a^2/4====

Answer 1

1/5a+1/7a=12/35a
12/35a*a²/4=3a/35

Answer 2

Приводим к НОЗ: (7/35a+5/35a)*а^2/4=12/35a*а^2/4=3а/35