Question

i will mark u as brainlist pls tell this​

Answer 1

Answer:

hope my answer helps you

Answer 2

Answer:

$a = \frac{1}{ \sqrt{3} - \sqrt{2} } \times \frac{ \sqrt{3} + \sqrt{2} }{ \sqrt{3} + \sqrt{2} } \\ = \sqrt{3} + \sqrt{2}$

$b = \frac{1}{ \sqrt{3} + \sqrt{2} } \times \frac{ \sqrt{3} - \sqrt{2} }{ \sqrt{3} - \sqrt{2} } \\ = \sqrt{3 } - \sqrt{2}$

${a}^{2} + {b}^{2} - 5ab \\ {( \sqrt{3} - \sqrt{2} ) }^{2} + ( { \sqrt{3} - \sqrt{2}) }^{2} - 5( \sqrt{3} - \sqrt{2} ) \times ( \sqrt{3} + \sqrt{2} ) \\ = 3 + 2 - 2 \times \sqrt{2 \times3} + 3 + 2 + 2 \times \sqrt{2 \times 3} - 5 \times (3 - 2) \\ 5 + 5 - 5 \times 1 \\ = 10 - 5 \\ = 5$