Question

Пошагово!срочно&₴+3+₴!37₴+37​

Answer 1

$frac{sqrt{7}+3 }{sqrt{7}-3 }-frac{sqrt{7}-3 }{sqrt{7}+3 }=frac{(sqrt{7}+3)(sqrt{7}+3)-(sqrt{7}-3)(sqrt{7}-3)}{(sqrt{7}-3)(sqrt{7}+3)} =frac{7+6sqrt{7}+9-7+6sqrt{7}-9}{(sqrt{7})^{2}-3^{2}}=frac{12sqrt{7} }{7-9}=-6sqrt{7}$