Question

Помогите решить, даю 30 баллов

Answer 1

1
u/(v-z)+(v-z)/v-uz/v(v-z)=(uv+v²-2vz+z²-uz)/v(v-z)=
[(u(v-z)+(v-z)²]/v(v-z)=(v-z)(u+v-z)/v(v-z)=(u+v-z)/v
2
u/(v-z)-(v-z)/v+uz/v(v-z)=(uv-v²+2vz-z²-uz)/v(v-z)=
=(u(v-z)-(v-z)²]/v(v-z)=(v-z)(u-v+z)/v(v-z)=(u-v+z)/v
3
(u+v-z)/v *v/(u-v+z)=(u+v-z)/(u-v+z)