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D( q )
q = 0
q = 0
q = 0
q in (-oo:0) U (0:+oo)
2*q+3/q = 180 // - 180
2*q+3/q-180 = 0
2*q^1+3*q^-1-180*q^0 = 0
(2*q^2-180*q^1+3*q^0)/(q^1) = 0 // * q^2
q^1*(2*q^2-180*q^1+3*q^0) = 0
q^1
2*q^2-180*q+3 = 0
2*q^2-180*q+3 = 0
DELTA = (-180)^2-(2*3*4)
DELTA = 32376
DELTA > 0
q = (32376^(1/2)+180)/(2*2) or q = (180-32376^(1/2))/(2*2)
q = (2*8094^(1/2)+180)/4 or q = (180-2*8094^(1/2))/4
q in { (180-2*8094^(1/2))/4, (2*8094^(1/2)+180)/4}
q in { (180-2*8094^(1/2))/4, (2*8094^(1/2)+180)/4 }
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