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Formula
Calculate the value
$\sqrt{ 45 } + \sqrt{ 125 } - \sqrt{ 20 }$
$6 \sqrt{ 5 }$
Calculate the value
$\sqrt{ \color{#FF6800}{ 45 } } + \sqrt{ 125 } - \sqrt{ 20 }$
 Organize the part that can be taken out of the radical sign inside the square root symbol 
$\color{#FF6800}{ 3 } \sqrt{ \color{#FF6800}{ 5 } } + \sqrt{ 125 } - \sqrt{ 20 }$
$3 \sqrt{ 5 } + \sqrt{ \color{#FF6800}{ 125 } } - \sqrt{ 20 }$
 Organize the part that can be taken out of the radical sign inside the square root symbol 
$3 \sqrt{ 5 } + \color{#FF6800}{ 5 } \sqrt{ \color{#FF6800}{ 5 } } - \sqrt{ 20 }$
$3 \sqrt{ 5 } + 5 \sqrt{ 5 } - \sqrt{ \color{#FF6800}{ 20 } }$
 Organize the part that can be taken out of the radical sign inside the square root symbol 
$3 \sqrt{ 5 } + 5 \sqrt{ 5 } - \left ( \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 5 } } \right )$
$3 \sqrt{ 5 } + 5 \sqrt{ 5 } \color{#FF6800}{ - } \left ( \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 5 } } \right )$
 Get rid of unnecessary parentheses 
$3 \sqrt{ 5 } + 5 \sqrt{ 5 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 5 } }$
$\color{#FF6800}{ 3 } \sqrt{ \color{#FF6800}{ 5 } } \color{#FF6800}{ + } \color{#FF6800}{ 5 } \sqrt{ \color{#FF6800}{ 5 } } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 5 } }$
 Calculate between similar terms 
$\color{#FF6800}{ 6 } \sqrt{ \color{#FF6800}{ 5 } }$
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