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D( x )
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0 // - 3
2*x = -3 // : 2
x = -3/2
x in (-oo:-3/2) U (-3/2:+oo)
(6*x^2+11*x+3)/(2*x+3) = 0
6*x^2+11*x+3 = 0
6*x^2+11*x+3 = 0
DELTA = 11^2-(3*4*6)
DELTA = 49
DELTA > 0
x = (49^(1/2)-11)/(2*6) or x = (-49^(1/2)-11)/(2*6)
x = -1/3 or x = -3/2
(x+3/2)*(x+1/3) = 0
((x+3/2)*(x+1/3))/(2*x+3) = 0
( x+1/3 )
x+1/3 = 0 // - 1/3
x = -1/3
( x+3/2 )
x+3/2 = 0 // - 3/2
x = -3/2
x in { -3/2}
x = -1/3
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