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(2*x^2)/3+(3*x^1)/3-5 = 0
(2*x^2)/3+(3*x)/3-5 = 0
2/3*x^2+x-5 = 0
DELTA = 1^2-(-5*2/3*4)
DELTA = 43/3
DELTA > 0
x = ((43/3)^(1/2)-1)/(2/3*2) or x = (-(43/3)^(1/2)-1)/(2/3*2)
x = 3/4*((43/3)^(1/2)-1) or x = -3/4*((43/3)^(1/2)+1)
x in { -3/4*((43/3)^(1/2)+1), 3/4*((43/3)^(1/2)-1) }
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