Question

срочно помогите решить алгебру

Answer 1

$4\sqrt{2}+\sqrt{50}-\sqrt{18}=4\sqrt{2}+\sqrt{25*2}-\sqrt{9*2}=\\\\=4\sqrt{2}+\sqrt{5^2*2}-\sqrt{3^2*2}=\\\\= 4\sqrt{2}+5\sqrt{2}-3\sqrt{2}=6\sqrt{2}$

$\sqrt{3}(2\sqrt{3}+\sqrt{12})=2(\sqrt{3})^2+\sqrt{3}*\sqrt{12}=2*3+\sqrt{3}*\sqrt{4*3}=\\\\=6+\sqrt{3}*2\sqrt{3}=6+2*3=6+6=12\\\\\\(\sqrt{5}-2)^2=(\sqrt{5})^2-2*\sqrt{5}*2+2^2=5-4\sqrt{5}+4=9-4\sqrt{5}\\\\\\(\sqrt{3}-\sqrt{2})(\sqrt{3}+\sqrt{2})=(\sqrt{3})^2-(\sqrt{2})^2=3-2=1$