Question

Tìm x không âm biết :

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

\(\sqrt{x}=0\)

Answer 1

\(\sqrt{x}^2\)=\(\sqrt{5}^2\)                                                       \(\sqrt{x}=0\)         ,<=>\(x^2\)=0       <=> x=0

<=>\(^{x^2=25}\)                                            

<=>x=5 (vi x không âm)

Answer 2

\(\sqrt{5}\)\(=\)\(\sqrt{5}\)

\(\sqrt{0}\)\(=0\)

Answer 3

\(\sqrt{x}=\sqrt{5}\Rightarrow x=5\)

\(\sqrt{x}=0\Rightarrow x=0\)