If $$x = 5 - \sqrt {21} {\text{,}}$$then the value of $$\frac{{\sqrt x }}{{\sqrt {32 - 2x}- \sqrt {21} }}$$is?

$\frac{1}{{\sqrt 2 }}\left( {\sqrt 7+ \sqrt 3 } \right)$$

$\frac{1}{{\sqrt 2 }}\left( {\sqrt 3- \sqrt 7 } \right)$$

$\frac{1}{{\sqrt 2 }}\left( {\sqrt 7- \sqrt 3 } \right)$$

$\frac{1}{{\sqrt 2 }}\left( {7 + \sqrt 3 } \right)$$

If $$x = 5 - \sqrt {21} {\text{,}}$$then the value of $$\frac{{\sqrt x

1.	If $$x = 5 - \sqrt {21} {\text{,}}$$then the value of $$\frac{{\sqrt x }}{{\sqrt {32 - 2x}- \sqrt {21} }}$$is?
A.	$\frac{1}{{\sqrt 2 }}\left( {\sqrt 3- \sqrt 7 } \right)$$
B.	$\frac{1}{{\sqrt 2 }}\left( {\sqrt 7- \sqrt 3 } \right)$$
C.	$\frac{1}{{\sqrt 2 }}\left( {\sqrt 7+ \sqrt 3 } \right)$$
D.	$\frac{1}{{\sqrt 2 }}\left( {7 + \sqrt 3 } \right)$$
Answer» C. $\frac{1}{{\sqrt 2 }}\left( {\sqrt 7+ \sqrt 3 } \right)$$