Răspunsuri

2014-07-08T13:12:47+03:00
|x+1/2 | =0  ∧  |y-1/2|=0

x+1/2=0      ∧   y-1/2=0

x= -1/2          ∧  y= 1/2

x*y=  (-1/2 ) * 1/2=  -1/4

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