Question

khử mẫu 2 căn 2 + 2 phần 5 căn 2

Answer 1

\(\dfrac{2\sqrt{2}+5}{\sqrt{2}}=\dfrac{4+5\sqrt{2}}{2}\)

Answer 2

\(\dfrac{2\sqrt{2}+2}{5\sqrt{2}}=\dfrac{\sqrt{2}\left(2\sqrt{2}+2\right)}{10}=\dfrac{4+2\sqrt{2}}{10}=\dfrac{2\left(2+\sqrt{2}\right)}{10}=\dfrac{2+\sqrt{2}}{5}\)