Question

24 баллов! Выполните вычитание

Answer 1

Ответ:

$\frac{2b - 3c}{b - 5c} + \frac{c - 3b}{5c - b} = \\ \\ \frac{2b - 3c}{b - 5c} + \frac{c - 3b}{ - (b - 5c)} = \\ \\ \frac{2b - 3c}{b - 5c} + \frac{ - (c - 3b)}{ b - 5c} = \\ \\ \frac{2b - 3c - c + 3b}{b - 5c} = \frac{5b - 4c}{b - 5c}$

Answer 2

=2b-3c/b-5c+c-3b/-(b-5c)=2b-3c/b-5c-c-3b/b-5c=2b-3c-(c-3b)/b-5c=5b-4c/b-5c