Question 429760
I'll say the factors are conjugate complex numbers
{{{ (a + b*i)*(a - b*i) = -36 }}}
{{{ 2a = -36 }}}
{{{ a = -18 }}}
and
{{{ ( -18 + b*i )*( -18 - b*i ) = -36 }}}
{{{ 324 - b^2 * i^2 = -36 }}}
{{{ b^2 = -360 }}}
{{{ b = 6*sqrt(10)*i }}}
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{{{ (-18 - 6*sqrt(10) )*( -18 + 6*sqrt(10)) }}}
{{{ 324 - 36*10 }}}
{{{ 324 - 360 = -36 }}}
The factors are 
{{{ -18 - 6*sqrt(10) }}} and
{{{- 18 + 6*sqrt(10) }}}