First thing you'd have to do would be to rewrite 252 as [tex] 6^{2 [/tex] · 7
[tex] \sqrt[]{ 6^{2} times 7 } [/tex]
Pull terms out from under the radical.
[tex]6 \sqrt[]{7} [/tex]
The result can be shown in both exact and decimal forms.
Exact Form :
[tex]6 \sqrt[]{7} [/tex]
Decimal Form :
15.87450786....
