Question 768963
{{{ sqrt( -16 ) = sqrt( -1*16 ) }}}
{{{ sqrt( -16 ) = sqrt( -1 ) * sqrt( 16 ) }}}
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Note that {{{ sqrt( -1 ) = i }}}
{{{ sqrt( -16 ) = 4i }}}
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also note that {{{ sqrt( 16 ) }}} has
a negative answer, too, so:
{{{ sqrt( -16 ) =-4i }}}
Those are the 2 solutions