Question

Пример Д, плиииииз ❤️

Answer 1

Объяснение:

$x^2=(\sqrt{7-2\sqrt{6}} -\sqrt{7 +2\sqrt{6} } )^2=\\=(\sqrt{7-2\sqrt{6} } )^2-2*\sqrt{7-2\sqrt{6} } *\sqrt{7+2\sqrt{6} } +(\sqrt{7+2\sqrt{6} })^2=\\=7-2\sqrt{6} -2*\sqrt{(7-2\sqrt{6)}*(7+2\sqrt{6} )} +7+2\sqrt{6}=\\=14-2*\sqrt{7^2-(2\sqrt{6} )^2} =14-2*\sqrt{49-24}=14-2*\sqrt{25}=14-2*5=4.\\x_1=-2\ \ \ \ x_2=2.$

Ответ: x₁=-2   x₂=2.