Question

Представь в виде дроби

Answer 1

(t-t/u)(t+t/u)=t²-t²/u²=(t²u²-t²)/u²=t²(u²-1)/u²

(10-m/v)(10+m/v)=10²-m²/v²=(100v²-m²)/v²

(10-m/v):(10+m/v)=(10v-m)/v : (10v+m)/v=
=(10v-m)/v . v/(10v+m)=(10v-m)/(10v+m)