Question

rationalize and explain​

Answer 1

Answer:

$\frac{1}{5 + \sqrt{7 } } = \frac{1}{5 + \sqrt{7} } \times \frac{5 - \sqrt{7} }{5 - \sqrt{7 } } \\ \frac{5 - \sqrt{7} }{ {5}^{2} - \sqrt{ {7}^{2} } } = \\ (a + b)(a - b) = {a}^{2} - {b}^{2} \\ \frac{5 - \sqrt{7} }{25 - 7} = \frac{5 - \sqrt{7} }{18} ans$

your ans

Answer 2

Answer:

5+71=5+71×5−75−752−725−7=(a+b)(a−b)=a2−b225−75−7=185−7ans

Step-by-step explanation:

brown 5+71=5+71×5−75−752−725−7=(a+b)(a−b)=a2−b225−75−7=185−7ans

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