Question

помогите пожалуйста)

Answer 1

$frac{ sqrt{7}- sqrt{2} }{ sqrt{7} + sqrt{2} } } - frac{ sqrt{7}+sqrt{2} }{ sqrt{7} - sqrt{2} } } = frac{(sqrt{7}- sqrt{2})^{2} -(sqrt{7} + sqrt{2} )^{2} }{(sqrt{7}- sqrt{2})(sqrt{7}+sqrt{2})} = frac{(sqrt{7}- sqrt{2})^{2} -(sqrt{7} + sqrt{2} )^{2} }{5}$