Question

\(\left(x+\frac{1}{2}\right)^2=\frac{4}{25}\)

Answer 1

<=> x + 1/2 = 2/5 hoặc x + 1/2 = -2/5 
tới đây giải tiếp là bạn ra x

Answer 2

\(\left(x+\frac{1}{2}\right)^2=\frac{4}{25}\Rightarrow\orbr{\begin{cases}x+\frac{1}{2}=\frac{2}{5}\\x+\frac{1}{2}=-\frac{2}{5}\end{cases}\Rightarrow\orbr{\begin{cases}x=-\frac{1}{10}\\x=-\frac{9}{10}\end{cases}}}\)

Vậy x = -1/10 , x = -9/10

Answer 3

\(\left(x+\frac{1}{2}\right)^2=\frac{4}{25}=>\sqrt{\left(x+\frac{1}{2}\right)^2}=\sqrt{\frac{4}{25}}\)

\(=>x+\frac{1}{2}=\frac{2}{5}\)

\(=>x=\frac{2}{5}-\frac{1}{2}\)

\(=>x=-\frac{1}{10}\)