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D( x )
(0.09375-x)^2 = 0
(0.09375-x)^2 = 0
(0.09375-x)^2 = 0
0.09375-x = 0 // - 0.09375
-x = -0.09375 // * -1
x = 0.09375
x in (-oo:0.09375) U (0.09375:+oo)
49 = x/((0.09375-x)^2) // - x/((0.09375-x)^2)
49-(x/((0.09375-x)^2)) = 0
(-1*x)/((0.09375-x)^2)+49 = 0
(-1*x)/((0.09375-x)^2)+(49*(0.09375-x)^2)/((0.09375-x)^2) = 0
49*(0.09375-x)^2-1*x = 0
49*x^2-10.1875*x+0.4306640625 = 0
49*x^2-10.1875*x+0.4306640625 = 0
49*x^2-10.1875*x+0.4306640625 = 0
DELTA = (-10.1875)^2-(0.4306640625*4*49)
DELTA = 10.1875^2-84.41015625
DELTA = 19.375
DELTA > 0
x = ((10.1875^2-84.41015625)^(1/2)+10.1875)/(2*49) or x = (10.1875-(10.1875^2-84.41015625)^(1/2))/(2*49)
x = ((10.1875^2-84.41015625)^(1/2)+10.1875)/98 or x = (10.1875-(10.1875^2-84.41015625)^(1/2))/98
(x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98))*(x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98)) = 0
((x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98))*(x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98)))/((0.09375-x)^2) = 0
((x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98))*(x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98)))/((0.09375-x)^2) = 0 // * (0.09375-x)^2
(x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98))*(x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98)) = 0
( x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98) )
x-(((10.1875^2-84.41015625)^(1/2)+10.1875)/98) = 0 // + ((10.1875^2-84.41015625)^(1/2)+10.1875)/98
x = ((10.1875^2-84.41015625)^(1/2)+10.1875)/98
( x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98) )
x-((10.1875-(10.1875^2-84.41015625)^(1/2))/98) = 0 // + (10.1875-(10.1875^2-84.41015625)^(1/2))/98
x = (10.1875-(10.1875^2-84.41015625)^(1/2))/98
x in { ((10.1875^2-84.41015625)^(1/2)+10.1875)/98, (10.1875-(10.1875^2-84.41015625)^(1/2))/98 }
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