Question

Задание 2 (30 баллов).

Докажите тождество:

Answer 1

Ответ:

$= 2 \frac{2}{7} a + \frac{9}{6} a + 9b - 9b = \frac{1}{4} a + 0.75a$

$= 2 \frac{2}{7} a + \frac{9}{7}a = \frac{1}{4} a + 0.75a$

$\frac{16}{7} a + \frac{9}{7} a = \frac{1}{4} a + \frac{3}{4} a$

$64a + 36a = 7a + 21a$

$100a = 28a$

$100a - 28a = 0$

$72a = 0$

$a = 0$

Объяснение:

$- 1 \frac{4}{14} (a - 5b - 2b) = - \frac{18}{14} \times (a - 7b) = - \frac{9}{7} \times (a - 7b) = - \frac{9}{7} a + 9b$