Question

Пожалуется номер 294

Answer 1

294.
1)
$\frac{15 \times 17 - 15 \times 6}{15 \times 17 + 15 \times 6} = \frac{15(17 - 6)}{15(17 + 6)} = \frac{17 - 6}{17 + 6} = \frac{11}{23}$
2)
$\frac{81 \times 17 - 15 \times 81}{81 \times 17 + 81 \times 4} = \frac{81(17 - 15)}{81(17 + 4)} = \frac{17 - 15}{17 + 4} = \frac{2}{21}$

Answer 2

1) 15*17-15*6/15*17+15*6= 15*(17-6)/15*(17+6)= -(17+6)/17+6= -1