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x in (-oo:+oo)
(6*x*(x+5))/24 = 741 // - 741
(6*x*(x+5))/24-741 = 0
(6*x*(x+5))/24+(-741*24)/24 = 0
6*x*(x+5)-741*24 = 0
6*x^2+30*x-17784 = 0
6*x^2+30*x-17784 = 0
6*(x^2+5*x-2964) = 0
x^2+5*x-2964 = 0
DELTA = 5^2-(-2964*1*4)
DELTA = 11881
DELTA > 0
x = (11881^(1/2)-5)/(1*2) or x = (-11881^(1/2)-5)/(1*2)
x = 52 or x = -57
6*(x+57)*(x-52) = 0
(6*(x+57)*(x-52))/24 = 0
(6*(x+57)*(x-52))/24 = 0 // * 24
6*(x+57)*(x-52) = 0
( x+57 )
x+57 = 0 // - 57
x = -57
( x-52 )
x-52 = 0 // + 52
x = 52
x in { -57, 52 }
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