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x^2-((7/2)*x)+3/2 = 0
x^2+(-7/2)*x+3/2 = 0
x^2-7/2*x+3/2 = 0
DELTA = (-7/2)^2-(1*3/2*4)
DELTA = 25/4
DELTA > 0
x = ((25/4)^(1/2)+7/2)/(1*2) or x = (7/2-(25/4)^(1/2))/(1*2)
x = 3 or x = 1/2
x in { 1/2, 3 }
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