Question 1059300
{{{ log( x+y ) + log( 2 ) = log( x^2 - y^2 ) }}}
{{{ log( 2*( x+y ) ) = log( x^2 + y^2 ) }}}
{{{ 2*( x + y ) = x^2 + y^2 }}}
{{{ x^2 + y^2 - 2x - 2y = 0 }}}