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x in (-oo:+oo)
24 = ((3*x-1)*(x+3))/2 // - ((3*x-1)*(x+3))/2
24-(((3*x-1)*(x+3))/2) = 0
(-1*(3*x-1)*(x+3))/2+24 = 0
(-1*(3*x-1)*(x+3))/2+(2*24)/2 = 0
2*24-1*(3*x-1)*(x+3) = 0
51-3*x^2-8*x = 0
51-3*x^2-8*x = 0
51-3*x^2-8*x = 0
DELTA = (-8)^2-(-3*4*51)
DELTA = 676
DELTA > 0
x = (676^(1/2)+8)/(-3*2) or x = (8-676^(1/2))/(-3*2)
x = -17/3 or x = 3
(x+17/3)*(x-3) = 0
((x+17/3)*(x-3))/2 = 0
((x+17/3)*(x-3))/2 = 0 // * 2
(x+17/3)*(x-3) = 0
( x+17/3 )
x+17/3 = 0 // - 17/3
x = -17/3
( x-3 )
x-3 = 0 // + 3
x = 3
x in { -17/3, 3 }
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