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D( x )
3*x <= 0
(x^2)/5 <= 0
3*x <= 0
3*x <= 0
3*x+0 <= 0 // - 0
3*x <= 0 // : 3
x <= 0/3
x <= 0
(x^2)/5 <= 0
(x^2)/5 <= 0
1/5*x^2 <= 0
1/5*x^2 <= 0 // : 1/5
x^2 <= 0/1/5
x^2 <= 0
x in <0:0>
x in (0:+oo)
4*ln((x^2)/5)+ln(3*x) = 0
ln(1*((x^2)/5)^4)+ln(3*x) = 0
ln(1*3*x*((x^2)/5)^4) = 0
ln(3*x*((x^2)/5)^4) = 0
ln(3*x*((x^2)/5)^4) = ln(e^0)
3*x*((x^2)/5)^4 = e^0
3*x*((x^2)/5)^4-e^0 = 0
3/625*x^9 = 1 // : 3/625
x^9 = 625/3
x^9 = 625/3 // ^ 1/9
x = (625/3)^(1/9)
x = (625/3)^(1/9)
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