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y in (-oo:+oo)
((3*y-2)*(4*y+2))/2 = 0
( 3*y-2 )
3*y-2 = 0 // + 2
3*y = 2 // : 3
y = 2/3
( 4*y+2 )
4*y+2 = 0 // - 2
4*y = -2 // : 4
y = -2/4
y = -1/2
y in { 2/3, -1/2 }
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