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x in (-oo:+oo)
(1/75000)*(950*x-(12*x^2)) = 0
(1/75000)*(950*x-12*x^2) = 0
1/75000*(950*x-12*x^2) = 0
950*x-12*x^2 = 0
2*x*(475-6*x) = 0
475-6*x = 0 // - 475
-6*x = -475 // : -6
x = -475/(-6)
x = 475/6
2*x*(x-475/6) = 0
1/75000*2*x*(x-475/6) = 0
( 1/75000 )
1/75000 = 0
x belongs to the empty set
( 2*x )
2*x = 0 // : 2
x = 0
( x-475/6 )
x-475/6 = 0 // + 475/6
x = 475/6
x in { 0, 475/6 }
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