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D( x )
3*x^2+7*x+4 = 0
3*x^2+7*x+4 = 0
3*x^2+7*x+4 = 0
3*x^2+7*x+4 = 0
DELTA = 7^2-(3*4*4)
DELTA = 1
DELTA > 0
x = (1^(1/2)-7)/(2*3) or x = (-1^(1/2)-7)/(2*3)
x = -1 or x = -4/3
x in (-oo:-4/3) U (-4/3:-1) U (-1:+oo)
((-x)^2-(2*x))/(3*x^2+7*x+4) = 0
((-x)^2-2*x)/(3*x^2+7*x+4) = 0
(x^2-2*x)/(3*x^2+7*x+4) = 0
x^2-2*x = 0
x*(x-2) = 0
x-2 = 0 // + 2
x = 2
x*(x-2) = 0
3*x^2+7*x+4 = 0
3*x^2+7*x+4 = 0
DELTA = 7^2-(3*4*4)
DELTA = 1
DELTA > 0
x = (1^(1/2)-7)/(2*3) or x = (-1^(1/2)-7)/(2*3)
x = -1 or x = -4/3
(x+4/3)*(x+1) = 0
(x*(x-2))/((x+4/3)*(x+1)) = 0
( x-2 )
x-2 = 0 // + 2
x = 2
( x )
x = 0
x in { 2, 0 }
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