Question

please try this question to solve ​

Answer 1

Answer:

Refers to this attached image

Answer 2

Step-by-step explanation:

$= > \sqrt{13 + 4 \sqrt{10} } - \sqrt{ - 7 - 2 \sqrt{10} } \\ = > identity \: ({a + b})^{2} = {a}^{2} + {b}^{2} + 2ab = {(a - b)}^{2} \\ = > \sqrt{8 + 5 + 4 \sqrt{5 \times 2} } - \sqrt{2 + 5 - 2 \sqrt{2 \times 5} } \\ = > \sqrt{ {(2 \sqrt{2} + \sqrt{5})}^{2} } - \sqrt{ ({ \sqrt{2} - \sqrt{5} })^{2} } \\ = > 2 \sqrt{2 } + \sqrt{5} - \sqrt{5} + \sqrt{2} \\ = > 2 \sqrt{2} + \sqrt{2} \\ = > 3 \sqrt{2}$