Question

Answer 1

\(a,=\left|2\sqrt{2}-3\right|=3-2\sqrt{2}\\ b,=\left|\dfrac{1}{\sqrt{2}}-\dfrac{1}{2}\right|=\dfrac{1}{\sqrt{2}}-\dfrac{1}{2}=\dfrac{\sqrt{2}-1}{2}\)

Answer 2

`a)\sqrt{(2\sqrt{2}-3)^2}=|2\sqrt{2}-3|=3-2\sqrt{2}` (Vì `2\sqrt{2} < 3`)

`b)\sqrt{(1/\sqrt{2}-1/2)^2}=|1/\sqrt{2}-1/2|=1/\sqrt{2}-1/2` (Vì `1/\sqrt{2} > 1/2`)