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Formula
Calculate the value
$\left( - \sqrt{ 9 } \right) ^{ 2 } - \left( - \sqrt{ 5 } \right) ^{ 2 } - \sqrt{ \left( -2 \right) ^{ 2 } }$
$2$
Calculate the value
$\left ( \color{#FF6800}{ - } \sqrt{ \color{#FF6800}{ 9 } } \right ) ^ { \color{#FF6800}{ 2 } } - \left ( - \sqrt{ 5 } \right ) ^ { 2 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
 Remove negative signs because negative numbers raised to even powers are positive 
$\left ( \sqrt{ 9 } \right ) ^ { 2 } - \left ( - \sqrt{ 5 } \right ) ^ { 2 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
$\left ( \sqrt{ \color{#FF6800}{ 9 } } \right ) ^ { \color{#FF6800}{ 2 } } - \left ( - \sqrt{ 5 } \right ) ^ { 2 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
 If you square the radical sign, it will disappear 
$\color{#FF6800}{ 9 } - \left ( - \sqrt{ 5 } \right ) ^ { 2 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
$9 - \left ( \color{#FF6800}{ - } \sqrt{ \color{#FF6800}{ 5 } } \right ) ^ { \color{#FF6800}{ 2 } } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
 Remove negative signs because negative numbers raised to even powers are positive 
$9 - \left ( \sqrt{ 5 } \right ) ^ { 2 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
$9 - \left ( \sqrt{ \color{#FF6800}{ 5 } } \right ) ^ { \color{#FF6800}{ 2 } } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
 If you square the radical sign, it will disappear 
$9 - \color{#FF6800}{ 5 } - \sqrt{ \left ( - 2 \right ) ^ { 2 } }$
$9 - 5 - \sqrt{ \left ( - 2 \right ) ^ { \color{#FF6800}{ 2 } } }$
 Organize as the power is written in the radical sign, and the root exponent and the exponent are the same 
$9 - 5 - \color{#FF6800}{ 2 }$
$\color{#FF6800}{ 9 } \color{#FF6800}{ - } \color{#FF6800}{ 5 } \color{#FF6800}{ - } \color{#FF6800}{ 2 }$
 Calculate the sum or the difference 
$\color{#FF6800}{ 2 }$
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