Question

Tìm x biết :\(7-\sqrt{x}=0.\)

 

Answer 1

\(7-\sqrt{x}=0\)

\(\sqrt{x}=7\)

\(x=49\)

Answer 2

\(7-\sqrt{x}=0\)

\(\Rightarrow\sqrt{x}=7-0=7\)

\(\Rightarrow\sqrt{x}=7\Rightarrow x=49\)

Answer 3

\(7-\sqrt{x}=0\)

\(\sqrt{x}=7-0\)

\(\sqrt{x}=7\)

\(\Rightarrow\sqrt{49}=7\)

\(\Rightarrow x=49\)

~ Hok tốt ~

Answer 4

\(7-\sqrt{x}=0\)

\(\sqrt{x}=7-0\)

\(\sqrt{x}=7\)

\(x=49\)

Answer 5

\(7-\sqrt{x}=0\)

\(\Leftrightarrow-\sqrt{x}=0-7\)

\(\Leftrightarrow-\sqrt{x}=-7\)

\(\Leftrightarrow\sqrt{x}=7\)

\(\Leftrightarrow\left(\sqrt{x}\right)^2=7^2\)

\(\Leftrightarrow x=49\)

Vậy x = 49