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Formula
Find the square root
$$\dfrac { 1 } { 4 }$$
$\pm \dfrac { 1 } { 2 }$
$\color{#FF6800}{ \dfrac { \color{#FF6800}{ 1 } } { \color{#FF6800}{ 4 } } }$
 For even square roots, $\pm$ is attached in front of the square root 
$\pm \sqrt{ \color{#FF6800}{ \dfrac { \color{#FF6800}{ 1 } } { \color{#FF6800}{ 4 } } } }$
$\pm \sqrt{ \color{#FF6800}{ \dfrac { \color{#FF6800}{ 1 } } { \color{#FF6800}{ 4 } } } }$
 Calculate the expression 
$\pm \color{#FF6800}{ \dfrac { \color{#FF6800}{ 1 } } { \color{#FF6800}{ 2 } } }$