Formula

Calculate the value

Answer

$2+ \sqrt{ 5 } +2- \sqrt{ 5 }$

$4$

Calculate the value

$2 \color{#FF6800}{ + } \sqrt{ \color{#FF6800}{ 5 } } + 2 \color{#FF6800}{ - } \sqrt{ \color{#FF6800}{ 5 } }$

$ $ Remove the two numbers if the values are the same and the signs are different $ $

$2 + 2$

$\color{#FF6800}{ 2 } \color{#FF6800}{ + } \color{#FF6800}{ 2 }$

$ $ Add $ 2 $ and $ 2$

$\color{#FF6800}{ 4 }$

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