Question

Please answer as soon as possible!!!

Answer 1

  $\frac{r + 5}{r^{2}+5r - 14 }$ ÷ $\frac{r^{2}+4r - 21 }{r - 2}$

$= \frac{r + 5}{r^{2}+5r - 14 } * \frac{r - 2}{r^{2}+4r - 21 }$

$=\frac{r + 5}{(r+7)(r - 2)} * \frac{r - 2}{(r + 7)(r - 3)}$

$=\frac{r + 5}{(r+7)} * \frac{1}{(r + 7)(r - 3)}$

$=\frac{r + 5}{(r+7)(r + 7)(r - 3)}$

Answer: B