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D( x )
x^2+8*x+64 = 0
x^2+8*x+64 = 0
x^2+8*x+64 = 0
x^2+8*x+64 = 0
DELTA = 8^2-(1*4*64)
DELTA = -192
DELTA < 0
x in (-oo:+oo)
16/(x^2+8*x+64) = 8 // - 8
16/(x^2+8*x+64)-8 = 0
x^2+8*x+64 = 0
x^2+8*x+64 = 0
x^2+8*x+64 = 0
DELTA = 8^2-(1*4*64)
DELTA = -192
DELTA < 0
1 = 0
16-8 = 0
16-8 = 0
8 = 0
8 = 0
x belongs to the empty set
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