Question

помогите сократить дробь

Answer 1

$\frac{a^2-4m^2-a+2m}{a^2-4m^2}=\\\\ =\frac{(a-2m)(a+2m)-(a-2m)}{(a-2m)(a+2m)}=\\\\ =\frac{(a-2m)(a+2m-1)}{(a-2m)(a+2m)}=\\\\ =\frac{a+2m-1}{a+2m}$

Ответ: E) $\frac{a+2m-1}{a+2m}$.