Question

rationalise the denominator : 1+√7/1-2√7​

Answer 1

Step-by-step explanation:

$\frac{1 + \sqrt{7} }{1 - 2 \sqrt{7} } = \frac{1 + \sqrt{7} }{1 - 2 \sqrt{7} } \times \frac{1 + 2 \sqrt{7} }{1 + 2 \sqrt{7} } = \frac{1 + 28 + 4 \sqrt{7} }{1 - 28} = \frac{29 + 4 \sqrt{7} }{ - 27} = \frac{ - 29 - 4 \sqrt{7} }{27}$

Answer 2

in the box I do wrong

it's answer :15/-24

i hope it is useful