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D( x )
2*x^2+7*x+3 = 0
2*x^2+7*x+3 = 0
2*x^2+7*x+3 = 0
2*x^2+7*x+3 = 0
DELTA = 7^2-(2*3*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)-7)/(2*2) or x = (-25^(1/2)-7)/(2*2)
x = -1/2 or x = -3
x in (-oo:-3) U (-3:-1/2) U (-1/2:+oo)
(6*x^2+17*x+7)/(2*x^2+7*x+3) = 0
6*x^2+17*x+7 = 0
6*x^2+17*x+7 = 0
DELTA = 17^2-(4*6*7)
DELTA = 121
DELTA > 0
x = (121^(1/2)-17)/(2*6) or x = (-121^(1/2)-17)/(2*6)
x = -1/2 or x = -7/3
(x+7/3)*(x+1/2) = 0
2*x^2+7*x+3 = 0
2*x^2+7*x+3 = 0
DELTA = 7^2-(2*3*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)-7)/(2*2) or x = (-25^(1/2)-7)/(2*2)
x = -1/2 or x = -3
(x+3)*(x+1/2) = 0
((x+7/3)*(x+1/2))/((x+3)*(x+1/2)) = 0
( x+1/2 )
x+1/2 = 0 // - 1/2
x = -1/2
( x+7/3 )
x+7/3 = 0 // - 7/3
x = -7/3
x in { -1/2}
x = -7/3
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