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