Question

Мерзляк 8 класс N627 СРОЧНО!!!

Answer 1

Ответ:

$10\sqrt{3} -5\sqrt{48} +2\sqrt{75} =10\sqrt{3} -5\sqrt{3*16} +2\sqrt{3*25} = 10\sqrt{3} -20\sqrt{3} +10\sqrt{3} = 0$

$(3\sqrt{5}-\sqrt{20} )\sqrt{5} = 3*5-\sqrt{20*5} = 15-\sqrt{100} = 15-10 = 5$

$(5-\sqrt{2})^2 = 25-10\sqrt{2} +2 = 27-10\sqrt{2}$