Question 542994
radical -5 * radical -2
{{{sqrt(-5) * sqrt(-2)}}}
:
Write it
{{{sqrt(-1*5) * sqrt(-1*2)}}}
:
The square root of -1 = i so we have
{{{i*sqrt(5)}}} * {{{i*sqrt(2)}}} = {{{i^2*sqrt(5*2)}}}
:
i^2 = -1 therefore
{{{-1*sqrt(10)}}} = {{{-sqrt(10)}}}