Question

как решать такой пример помогите ​

Answer 1

$(\sqrt{8}-3)(3+2\sqrt{2})=(\sqrt{8}-3)(3+\sqrt{8})=(\sqrt{8}-3)(\sqrt{8}+3)=\\\\=(\sqrt{8})^2-3^2=8-9=-1\\\\\\(\sqrt{50}+4\sqrt{2})\sqrt{2}=\sqrt{50}\sqrt{2}+4\sqrt{2} \sqrt{2}=\sqrt{50*2}+4\sqrt{2*2}=\sqrt{100}+4\sqrt{4}=\\\\=10+4*2=10+8=18$