Question

Пошагово!срочно&₴+3+₴!37₴+37​

Answer 1

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