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b in (-oo:+oo)
((3*b^1)/2)*((5*b^3)/2+(2*b^1)/2) = 0
((3*b)/2)*((5*b^3)/2+(2*b)/2) = 0
3/2*b*(5/2*b^3+b) = 0
5/2*b^3+b = 0
b*(5/2*b^2+1) = 0
5/2*b^2 = -1 // : 5/2
b^2 = -2/5
b = 0
3/2*b*b = 0
( 3/2*b )
3/2*b = 0 // : 3/2
b = 0
( b )
b = 0
b in { 0, 0 }
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