Question

Упростите выражения ​

Answer 1

$a)\; \; \frac{c}{b\, (c-2b)}+\frac{2}{2b-c}=\frac{c}{b(c-2b)}^{|1}-\frac{2}{c-2b}^{|b}=\frac{c-2b}{b\, (c-2b)}=\frac{1}{b}\\\\\\b)\; \; \frac{6}{a(a-2)}+\frac{3}{2-a}=\frac{6}{a\, (a-2)}^{|1}-\frac{3}{a-2}^{|a}=\frac{6-3a}{a\, (a-2)}=\frac{-3(a-2)}{a\, (a-2)}=-\frac{3}{a}$