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D( x )
12*x^2+14*x+4 = 0
12*x^2+14*x+4 = 0
12*x^2+14*x+4 = 0
12*x^2+14*x+4 = 0
DELTA = 14^2-(4*4*12)
DELTA = 4
DELTA > 0
x = (4^(1/2)-14)/(2*12) or x = (-4^(1/2)-14)/(2*12)
x = -1/2 or x = -2/3
x in (-oo:-2/3) U (-2/3:-1/2) U (-1/2:+oo)
(4*x+2)/(12*x^2+14*x+4) = 0
12*x^2+14*x+4 = 0
2*(6*x^2+7*x+2) = 0
6*x^2+7*x+2 = 0
DELTA = 7^2-(2*4*6)
DELTA = 1
DELTA > 0
x = (1^(1/2)-7)/(2*6) or x = (-1^(1/2)-7)/(2*6)
x = -1/2 or x = -2/3
2*(x+2/3)*(x+1/2) = 0
(4*x+2)/(2*(x+2/3)*(x+1/2)) = 0
4*x+2 = 0 // - 2
4*x = -2 // : 4
x = -2/4
x = -1/2
x in { -1/2}
x belongs to the empty set
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