Question

attachment

Answer 1

which q you need help wid

Answer 2

all of them

Answer 3

ok to simplify radicals you need to use this property:
\[\sqrt{mn} = \sqrt{m}*\sqrt{n}\]
and recognize perfect squares... 4,9,16,25...
example:
\[\sqrt{32} = \sqrt{16*2}=\sqrt{16}\sqrt{2} = 4\sqrt{2}\]
since 16 is a factor of 32 and is a perfect square (we know sqrt(16) is 4) it can be pulled out of radical just leaving the 2 inside