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D( x )
x < 0
x < 0
x in <0:+oo)
100*x^(1/2)-(2*x) = 625 // - 625
100*x^(1/2)-(2*x)-625 = 0
100*x^(1/2)-2*x-625 = 0
t_1 = x^(1/2)
100*t_1^1-2*t_1^2-625 = 0
100*t_1-2*t_1^2-625 = 0
DELTA = 100^2-(-625*(-2)*4)
DELTA = 5000
DELTA > 0
t_1 = (5000^(1/2)-100)/(-2*2) or t_1 = (-5000^(1/2)-100)/(-2*2)
t_1 = (50*2^(1/2)-100)/(-4) or t_1 = (-50*2^(1/2)-100)/(-4)
t_1 = (50*2^(1/2)-100)/(-4)
x^(1/2)-((50*2^(1/2)-100)/(-4)) = 0
1*x^(1/2) = (50*2^(1/2)-100)/(-4) // : 1
x^(1/2) = (50*2^(1/2)-100)/(-4)
x^(1/2) = (50*2^(1/2)-100)/(-4) // ^ 2
x = ((50*2^(1/2)-100)^2)/16
t_1 = (-50*2^(1/2)-100)/(-4)
x^(1/2)-((-50*2^(1/2)-100)/(-4)) = 0
1*x^(1/2) = (-50*2^(1/2)-100)/(-4) // : 1
x^(1/2) = (-50*2^(1/2)-100)/(-4)
x^(1/2) = (-50*2^(1/2)-100)/(-4) // ^ 2
x = ((-50*2^(1/2)-100)^2)/16
x in { ((50*2^(1/2)-100)^2)/16, ((-50*2^(1/2)-100)^2)/16 }
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