Question

please answer the following questions frequently

Answer 1

hence your answers this questions

Answer 2

$\alpha + \beta = \frac{2}{1} \\ \alpha \beta = - \sqrt{5}$
1)
$( { \alpha - \beta )}^{2} = ( { \alpha + \beta) }^{2} - 4 \alpha \beta \\ = {2}^{2} - 4( - \sqrt{5} ) \\ = 4 + 4 \sqrt{5} \\ ( \alpha - \beta ) = \sqrt{(4 + 4 \sqrt{5} )} \\ = 2 \sqrt{(1 + \sqrt{5}) }$