2 câu trả lời
`C=3\sqrt{8}-\sqrt{50}-\sqrt{(\sqrt{2}-1)^2}`
`C=6\sqrt{2}-5\sqrt{2}-|\sqrt{2}-1|`
`C=\sqrt{2}-\sqrt{2}+1`
`C=1`
$\text{C=3$\sqrt{8}$-$\sqrt{50}$-$\sqrt{(√2-1)²}$}$
$\text{C=6$\sqrt{2}$-5$\sqrt{2}$-l$\sqrt{2}$-1l}$
$\text{C=6$\sqrt{2}$-5$\sqrt{2}$-$\sqrt{2}$+1}$
$\text{C=1}$
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