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-4*x^2-((5/26)*x) = 0
(-5/26)*x-4*x^2 = 0
-4*x^2-5/26*x = 0
DELTA = (-5/26)^2-(-4*0*4)
DELTA = 25/676
DELTA > 0
x = ((25/676)^(1/2)+5/26)/(-4*2) or x = (5/26-(25/676)^(1/2))/(-4*2)
x = -5/104 or x = 0
x in { -5/104, 0 }
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