Question 779116
There is no real number square root of -8, because any number times itself is a positive number.<P>
There is an imaginary number, i, such that {{{i = sqrt(-1)}}}<P>
{{{sqrt(-8) = sqrt(-1*2*4) = 2i*sqrt(2)}}}<P>
{{{6+ sqrt (-8) = 6+2i*sqrt(2) = 2(3+i*sqrt(2))}}}