Question

Изи пример(времени нет) ​

Answer 1

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