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