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Calculate the value
$\dfrac{ \sqrt{ 6 } }{ 9 } - \dfrac{ \sqrt{ 24 } }{ 9 } + \dfrac{ \sqrt{ 7 } }{ 3 }$
$\dfrac { - \sqrt{ 6 } + 3 \sqrt{ 7 } } { 9 }$
Calculate the value
$\dfrac { \sqrt{ 6 } } { 9 } - \dfrac { \sqrt{ \color{#FF6800}{ 24 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
 Organize the part that can be taken out of the radical sign inside the square root symbol 
$\dfrac { \sqrt{ 6 } } { 9 } - \dfrac { \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 6 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
$\color{#FF6800}{ \dfrac { \sqrt{ 6 } } { 9 } } \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 2 \sqrt{ 6 } } { 9 } } + \dfrac { \sqrt{ 7 } } { 3 }$
 Since the denominator is the same as $9$ , combine the fractions into one 
$\color{#FF6800}{ \dfrac { \sqrt{ 6 } - \left ( 2 \sqrt{ 6 } \right ) } { 9 } } + \dfrac { \sqrt{ 7 } } { 3 }$
$\dfrac { \sqrt{ 6 } \color{#FF6800}{ - } \left ( \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 6 } } \right ) } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
 Get rid of unnecessary parentheses 
$\dfrac { \sqrt{ 6 } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 6 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
$\dfrac { \sqrt{ \color{#FF6800}{ 6 } } \color{#FF6800}{ - } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 6 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
 Calculate between similar terms 
$\dfrac { \color{#FF6800}{ - } \color{#FF6800}{ 1 } \sqrt{ \color{#FF6800}{ 6 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
$\dfrac { \color{#FF6800}{ - } \color{#FF6800}{ 1 } \sqrt{ 6 } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
 Multiplying any number by 1 does not change the value 
$\dfrac { - \sqrt{ 6 } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
$\dfrac { \color{#FF6800}{ - } \sqrt{ \color{#FF6800}{ 6 } } } { 9 } + \dfrac { \sqrt{ 7 } } { 3 }$
 Move the minus sign to the front of the fraction 
$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { \sqrt{ 6 } } { 9 } } + \dfrac { \sqrt{ 7 } } { 3 }$
$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { \sqrt{ 6 } } { 9 } } \color{#FF6800}{ + } \color{#FF6800}{ \dfrac { \sqrt{ 7 } } { 3 } }$
 Find the sum of the fractions 
$\color{#FF6800}{ \dfrac { - \sqrt{ 6 } + 3 \sqrt{ 7 } } { 9 } }$
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