Question

rationalise the denominator 7+root 5/7-root5​

Answer 1

Step-by-step explanation:

$\frac{7 + \sqrt{5} }{7 - \sqrt{5} } \times \frac{7 + \sqrt{5} }{7 + \sqrt{5} } \\ = \frac{ {(7 + \sqrt{5)} }^{2} }{49 - 5} \\ = \frac{49 + 5 + 14 \sqrt{5} }{44} \\ = \frac{54 + 14 \sqrt{5} }{44}$