Question

Rationalize the following number
$5 \div \sqrt{7} - 3$

Please answer it fast it is very urgent ​

Answer 1

Answer:

Given,

Required to rationalize,

$\frac{5}{\sqrt{7} -3} \\=\frac{5}{\sqrt{7} -3} *\frac{\sqrt{7}+3 }{\sqrt{7}+3} \\=\frac{5(\sqrt{7}+3) }{(\sqrt{7} ^{2})-(3^{2}) } \\=\frac{5(\sqrt{7}+3) }{49-9} \\=\frac{5(\sqrt{7}+3) }{40}\\= \frac{(\sqrt{7}+3) }{8}$