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36*x^2-((1/36)*x^2)-(12*x)+1 = 0
36*x^2+(-1/36)*x^2-12*x+1 = 0
1295/36*x^2-12*x+1 = 0
DELTA = (-12)^2-(1*4*1295/36)
DELTA = 1/9
DELTA > 0
x = ((1/9)^(1/2)+12)/(2*1295/36) or x = (12-(1/9)^(1/2))/(2*1295/36)
x = 6/35 or x = 6/37
x in { 6/37, 6/35 }
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