Question

Выполните умножение: $(\frac{u}{u} + \frac{4u}{u} -4)* \frac{uu}{2u-u}$

Answer 1

$( \frac{u}{u} + \frac{4u}{u} -4)\cdot \frac{uu}{2u-u} =(1+4-4)\cdot u=u$