Question 1131438
Not sure how to type it, but the question is write the following radical in simplest form:
 If you can express is at a real number: (a small 4 outside the radical sign), radical sign -16.
:
{{{4sqrt(-16)}}}, the 4th root of -16
we can factor this like this
{{{4sqrt(2*2*2*2*-1)}}}
extract the square root of -1
{{{i*4sqrt(2*2*2*2)}}}
obviously the 4th root is 2, so we have just
2i