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D( x )
4*x^2-(0.8*x)+0.16 = 0
4*x^2-(0.8*x)+0.16 = 0
4*x^2-(0.8*x)+0.16 = 0
4*x^2-0.8*x+0.16 = 0
4*x^2-0.8*x+0.16 = 0
DELTA = (-0.8)^2-(0.16*4*4)
DELTA = 0.8^2-2.56
DELTA = -1.92
DELTA < 0
x in (-oo:+oo)
(x^2)/(4*x^2-(0.8*x)+0.16) = 53.3 // - 53.3
(x^2)/(4*x^2-(0.8*x)+0.16)-53.3 = 0
(x^2)/(4*x^2-0.8*x+0.16)-53.3 = 0
4*x^2-0.8*x+0.16 = 0
4*x^2-0.8*x+0.16 = 0
4*x^2-0.8*x+0.16 = 0
DELTA = (-0.8)^2-(0.16*4*4)
DELTA = 0.8^2-2.56
DELTA = -1.92
DELTA < 0
1 = 0
x^2-53.3 = 0
1*x^2 = 53.3 // : 1
x^2 = 53.3
x^2 = 53.3 // ^ 1/2
abs(x) = 53.3^(1/2)
x = 53.3^(1/2) or x = -53.3^(1/2)
x in { 53.3^(1/2), -53.3^(1/2) }
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