Question

maybe

Answer 1

\[\frac{ 6 }{ \sqrt{7}-\sqrt{5} }\] do you multiply the bottom

Answer 2

you multiply both the top and bottom by \[\Large \sqrt{7} + \sqrt{5}\]

Answer 3

42 and 30 then

Answer 4

you can't multiply the 6 (outside the square root) by either the 7 or 5 (both in their own square roots) like that

Answer 5

so \[6\sqrt{35}\]

Answer 6

no

Answer 7

multiply 6 by \[\Large \sqrt{7} + \sqrt{5}\] to get

\[\Large 6(\sqrt{7} + \sqrt{5}) = 6\sqrt{7} + 6\sqrt{5}\]

and that's all really you can do (for the numerator)