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D( x )
2*x+67 = 0
2*x+67 = 0
2*x+67 = 0
2*x+67 = 0 // - 67
2*x = -67 // : 2
x = -67/2
x in (-oo:-67/2) U (-67/2:+oo)
3/(2*x+67) = 5*(x-1) // - 5*(x-1)
3/(2*x+67)-(5*(x-1)) = 0
3/(2*x+67)-5*(x-1) = 0
3/(2*x+67)+(-5*(x-1)*(2*x+67))/(2*x+67) = 0
3-5*(x-1)*(2*x+67) = 0
338-10*x^2-325*x = 0
338-10*x^2-325*x = 0
338-10*x^2-325*x = 0
DELTA = (-325)^2-(-10*4*338)
DELTA = 119145
DELTA > 0
x = (119145^(1/2)+325)/(-10*2) or x = (325-119145^(1/2))/(-10*2)
x = (13*705^(1/2)+325)/(-20) or x = (325-13*705^(1/2))/(-20)
(x-((13*705^(1/2)+325)/(-20)))*(x-((325-13*705^(1/2))/(-20))) = 0
((x-((13*705^(1/2)+325)/(-20)))*(x-((325-13*705^(1/2))/(-20))))/(2*x+67) = 0
((x-((13*705^(1/2)+325)/(-20)))*(x-((325-13*705^(1/2))/(-20))))/(2*x+67) = 0 // * 2*x+67
(x-((13*705^(1/2)+325)/(-20)))*(x-((325-13*705^(1/2))/(-20))) = 0
( x-((13*705^(1/2)+325)/(-20)) )
x-((13*705^(1/2)+325)/(-20)) = 0 // + (13*705^(1/2)+325)/(-20)
x = (13*705^(1/2)+325)/(-20)
( x-((325-13*705^(1/2))/(-20)) )
x-((325-13*705^(1/2))/(-20)) = 0 // + (325-13*705^(1/2))/(-20)
x = (325-13*705^(1/2))/(-20)
x in { (13*705^(1/2)+325)/(-20), (325-13*705^(1/2))/(-20) }
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