Question

Rút gọn:

\(\sqrt{11+6\sqrt{2}}-\sqrt{51+14\sqrt{2}}\)

Answer 1

\(=\sqrt{\left(3+\sqrt{2}\right)^2}-\sqrt{\left(7+\sqrt{2}\right)^2}=3+\sqrt{2}-7-\sqrt{2}=-4\)

Answer 2

\(\sqrt{11+6\sqrt{2}}\) - \(\sqrt{51+14\sqrt{2}}\)

= -4