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(3*x^2)/11-((31*x)/22)+35/22 = 0
(3*x^2)/11+(-31/22)*x+35/22 = 0
3/11*x^2-31/22*x+35/22 = 0
DELTA = (-31/22)^2-(3/11*35/22*4)
DELTA = 1/4
DELTA > 0
x = ((1/4)^(1/2)+31/22)/(3/11*2) or x = (31/22-(1/4)^(1/2))/(3/11*2)
x = 7/2 or x = 5/3
x in { 5/3, 7/2 }
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