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D( x )
x/4 <= 0
17*x-4 <= 0
x/4 <= 0
x/4 <= 0
1/4*x+0 <= 0 // - 0
1/4*x <= 0 // : 1/4
x <= 0/1/4
x <= 0
17*x-4 <= 0
17*x-4 <= 0
17*x-4 <= 0 // + 4
17*x <= 4 // : 17
x <= 4/17
x in (4/17:+oo)
log(x/4)(17*x-4) = 2 // - 2
log(x/4)(17*x-4)-2 = 0
log(x/4)(17*x-4)-2 = 0 // + 2
log(x/4)(17*x-4) = 2
log(x/4)(17*x-4) = log(x/4)((x/4)^2)
17*x-4 = (x/4)^2
17*x-(x/4)^2-4 = 0
17*x-1/16*x^2-4 = 0
DELTA = 17^2-(-4*(-1/16)*4)
DELTA = 288
DELTA > 0
x = (288^(1/2)-17)/(-1/16*2) or x = (-288^(1/2)-17)/(-1/16*2)
x = -8*(12*2^(1/2)-17) or x = -8*(-12*2^(1/2)-17)
x in { -8*(12*2^(1/2)-17), -8*(-12*2^(1/2)-17) }
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