Question

Спростіть вираз 40 балов​

Answer 1

Ответ:

0.75

$\displaystyle \boldsymbol { \frac{7+b}{2} }$

Объяснение:

$\displaystyle \frac{6a-1}{16a-8} +\frac{4a-7}{16a-8} -\frac{2a+2}{8-16a} = \frac{6a-1}{16a-8} +\frac{4a-7}{16a-8} +\frac{2a+2}{16a-8} =\\\\\\=\frac{6a-1+4a-7+2a+2}{16a-8} =\frac{12a-6}{16a-8} =\frac{6(2a-1)}{8(2a-1)} =\frac{6}{8} =0.75$

$\displaystyle \frac{b^2}{2b-14} +\frac{49}{14-2b} =-\frac{b^2}{14-2b} +\frac{49}{14-2b} =\frac{49-b^2}{14-2b} =\frac{(7-b)(7+b)}{2(7-b)} =\frac{7+b}{2}$