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Formula
Calculate the value
Answer
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$\dfrac{ 21 }{ \sqrt{ 7 } } + \sqrt{ 28 } -4 \sqrt{ 7 }$
$\sqrt{ 7 }$
Calculate the value
$\color{#FF6800}{ \dfrac { 21 } { \sqrt{ 7 } } } + \sqrt{ 28 } - 4 \sqrt{ 7 }$
$ $ Calculate the expression $ $
$\color{#FF6800}{ 3 } \sqrt{ \color{#FF6800}{ 7 } } + \sqrt{ 28 } - 4 \sqrt{ 7 }$
$3 \sqrt{ 7 } + \sqrt{ \color{#FF6800}{ 28 } } - 4 \sqrt{ 7 }$
$ $ Organize the part that can be taken out of the radical sign inside the square root symbol $ $
$3 \sqrt{ 7 } + \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 7 } } - 4 \sqrt{ 7 }$
$\color{#FF6800}{ 3 } \sqrt{ \color{#FF6800}{ 7 } } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \sqrt{ \color{#FF6800}{ 7 } } \color{#FF6800}{ - } \color{#FF6800}{ 4 } \sqrt{ \color{#FF6800}{ 7 } }$
$ $ Calculate between similar terms $ $
$\color{#FF6800}{ 1 } \sqrt{ \color{#FF6800}{ 7 } }$
$\color{#FF6800}{ 1 } \sqrt{ 7 }$
$ $ Multiplying any number by 1 does not change the value $ $
$\sqrt{ 7 }$
Solution search results
search-thumbnail-The rationalizing factor of \sqrt{23} is 
$°$ $Options^{°}$ $0$ 
A 24 
23 
C \sqrt{23} 
D None of these
7th-9th grade
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