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Bumek [7]
3 years ago
8

Divide : algebraic fractions

Mathematics
1 answer:
ryzh [129]3 years ago
4 0

Answer:  C

<u>Step-by-step explanation:</u>

   \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-2)}{(r+7)(r-2)(r+7)(r-3)}

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

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