Question

Помогите срочно! 1 и 2

Answer 1

$1)2ab\sqrt{a^{6}b } +6a^{4}b\sqrt{b}=2ab*a^{3}\sqrt{b}+6a^{4}b\sqrt{b} =2a^{4}b\sqrt{b}+6a^{4}b\sqrt{b}=8a^{4}b\sqrt{b}$

$2)\sqrt{10}(\sqrt{90}-2\sqrt{45}+\sqrt{125})+5\sqrt{2}=\sqrt{10}(\sqrt{9*10}-2\sqrt{9*5}+\sqrt{25*5})+5\sqrt{2} =\sqrt{10}(3\sqrt{10}-2*3\sqrt{5}+5\sqrt{5})+5\sqrt{2}=\sqrt{10}(3\sqrt{10} -\sqrt{5})+5\sqrt{2}=\sqrt{10}*3\sqrt{10} -\sqrt{10}*\sqrt{5}+\sqrt{25*2}=3*10-\sqrt{50}+\sqrt{50} =30$