Question

rationalize the denominator of -1 root7 -2
$rationalise the denomintor of - 1 upon \sqrt{7 - 2}$
​

Answer 1

Step-by-step explanation:

$\frac{1}{ \sqrt{7} - 2} \\ \frac{1}{ \sqrt{7} - 2} \times \frac{ \sqrt{7} + 2}{ \sqrt{7} + 2 } \\ \frac{ \sqrt{7} + 2}{( \sqrt{7}) {}^{2} - (2) {}^{2} } \\ \frac{ \sqrt{7} + 2}{7 - 4} \\ \frac{ \sqrt{7} + 2}{3} \: \: \: \: ans$