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x in (-oo:+oo)
(8*x+5/4)*(8*x-(1/4)) = 0
(8*x+5/4)*(8*x-1/4) = 0
( 8*x+5/4 )
8*x+5/4 = 0 // - 5/4
8*x = -5/4 // : 8
x = -5/4/8
x = -5/32
( 8*x-1/4 )
8*x-1/4 = 0 // + 1/4
8*x = 1/4 // : 8
x = 1/4/8
x = 1/32
x in { -5/32, 1/32 }
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