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Stolb23 [73]
3 years ago
8

Please answer as soon as possible!!!

Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0

  \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


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