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x in (-oo:+oo)
(2*x-16)*((1/2)*x+14)+x-28 = 180 // - 180
(2*x-16)*((1/2)*x+14)+x-180-28 = 0
(2*x-16)*(1/2*x+14)+x-180-28 = 0
(2*x-16)*(1/2*x+14)+x-180-28 = 0
x^2+21*x-224-180-28 = 0
x^2+21*x-404-28 = 0
x^2+21*x-432 = 0
x^2+21*x-432 = 0
x^2+21*x-432 = 0
DELTA = 21^2-(-432*1*4)
DELTA = 2169
DELTA > 0
x = (2169^(1/2)-21)/(1*2) or x = (-2169^(1/2)-21)/(1*2)
x = (3*241^(1/2)-21)/2 or x = (-3*241^(1/2)-21)/2
(x-((-3*241^(1/2)-21)/2))*(x-((3*241^(1/2)-21)/2)) = 0
(x-((-3*241^(1/2)-21)/2))*(x-((3*241^(1/2)-21)/2)) = 0
( x-((-3*241^(1/2)-21)/2) )
x-((-3*241^(1/2)-21)/2) = 0 // + (-3*241^(1/2)-21)/2
x = (-3*241^(1/2)-21)/2
( x-((3*241^(1/2)-21)/2) )
x-((3*241^(1/2)-21)/2) = 0 // + (3*241^(1/2)-21)/2
x = (3*241^(1/2)-21)/2
x in { (-3*241^(1/2)-21)/2, (3*241^(1/2)-21)/2 }
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