Question 52963
This might be easier to read.  Your previous e tutor was right!
{{{sqrt(-8)}}}
{{{sqrt(-1*4*2)}}}
{{{sqrt(-1)}}}*{{{sqrt(4)}}}*{{{sqrt(2)}}}
{{{i*2*sqrt(2)}}}
Some teachers prefer {{{2*i*sqrt(2)}}}.
Others prefer {{{2*sqrt(2)*i}}}