If x= (3+ 1)/(3-1 ) and y= (3-1 )/(3 + 1 ) find the value of x^2+xy-y^2
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X=2
Y=1/2
(2)^2 +2(1/2)- (1/2)^2
4+1- (1/4)
5- 1/4
19/4
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