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2014-09-22T14:54:21+05:30
 x^{2} - y^{2} +6y-9 =0\\ or, x^{2} -( y^{2} -6y+9)=0 \\ or, x^{2} -( y-3)^{2}=0  \\ or,(x+y-3)(x-y+3)=0
therefore ,x+y-3=0
             or, x+y = 3 ------(1)
And,      x-y+3 = 0
         or, x-y = -3 ----(2)
from Eqn(1) & (2)
x = 0
 and y = 3
2 5 2
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