Question

căn 5-x=2

Answer 1

`sqrt(5-x) = 2`

`-> 5 - x = 4`

`-> x = 1`

`sqrt 5 - x = 2`

`-> x = sqrt 5 - 2`

Answer 2

bn ghi rõ đề bài ra nhé

\(\sqrt{5}-x=2\)

\(\Leftrightarrow x=\sqrt{5}-2\)

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\(\sqrt{5-x}=2\)

\(\Rightarrow\sqrt{5-x}=2^2\)

\(\Rightarrow5-x=4\)

\(\Rightarrow x=5-4=1\)