Question 1023905
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Hi  
D = {{{ sqrt ( (x[1]-x[2])^2+ (y[1]-y[2])^2 ) }}}
(-1,7)
(-9,9) D = {{{ sqrt ( (8)^2+ (-2)^2 ) }}}
(8,1)  D = {{{ sqrt ( (-17)^2+ (8)^2 ) }}}
(-1,7) D = {{{ sqrt ( (9)^2+ (-6)^2 ) }}}
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