so first factor it
1008=2*2*2*2*3*3*7
group them in similar pairs
1008=(2*2)(2*2)(3*3)*7
now remember we can do
[tex] \sqrt{xy}= \sqrt{x} \sqrt{y} [/tex] so
[tex] \sqrt{1008}= (\sqrt{2*2}) (\sqrt{2*2}) (\sqrt{3*3}) (\sqrt{7}) [/tex]=
2*2*3*[tex] \sqrt{7} [/tex]=
12√7
the answer is B
