Question

Rationalize the denominator
1/5-3√7​

Answer 1

Answer:

$\frac{1}{5-3\sqrt{7} } X \frac{5+3\sqrt{7}}{5+3\sqrt{7} }\\\\= \frac{5+3\sqrt{7}}{25-63} \\=\frac{5+3\sqrt{7}}{-38}\\=\frac{-1(5+3\sqrt{7})}{38} \\= \frac{-5-3\sqrt{7}}{38}$

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