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x in (-oo:+oo)
2*x^2 = (17/3)*x+1 // - (17/3)*x+1
2*x^2-((17/3)*x)-1 = 0
2*x^2+(-17/3)*x-1 = 0
2*x^2-17/3*x-1 = 0
DELTA = (-17/3)^2-(-1*2*4)
DELTA = 361/9
DELTA > 0
x = ((361/9)^(1/2)+17/3)/(2*2) or x = (17/3-(361/9)^(1/2))/(2*2)
x = 3 or x = -1/6
x in { -1/6, 3 }
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