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44*x-(((4*x)/2)*x)-(2*(1/4)*x) = (45*x)/2 // - (45*x)/2
44*x-(((4*x)/2)*x)-(2*(1/4)*x)-((45*x)/2) = 0
44*x-2*x^2+(-1/2)*x+(-45/2)*x = 0
21*x-2*x^2 = 0
DELTA = 21^2-(-2*0*4)
DELTA = 441
DELTA > 0
x = (441^(1/2)-21)/(-2*2) or x = (-441^(1/2)-21)/(-2*2)
x = 0 or x = 21/2
x in { 0, 21/2 }
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