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D( x )
x+2 = 0
x+2 = 0
x+2 = 0
x+2 = 0 // - 2
x = -2
x in (-oo:-2) U (-2:+oo)
(4*x^2+14*x+11)/(x+2) = 0
4*x^2+14*x+11 = 0
4*x^2+14*x+11 = 0
DELTA = 14^2-(4*4*11)
DELTA = 20
DELTA > 0
x = (20^(1/2)-14)/(2*4) or x = (-20^(1/2)-14)/(2*4)
x = (2*5^(1/2)-14)/8 or x = (-2*5^(1/2)-14)/8
(x-((-2*5^(1/2)-14)/8))*(x-((2*5^(1/2)-14)/8)) = 0
((x-((-2*5^(1/2)-14)/8))*(x-((2*5^(1/2)-14)/8)))/(x+2) = 0
( x-((-2*5^(1/2)-14)/8) )
x-((-2*5^(1/2)-14)/8) = 0 // + (-2*5^(1/2)-14)/8
x = (-2*5^(1/2)-14)/8
( x-((2*5^(1/2)-14)/8) )
x-((2*5^(1/2)-14)/8) = 0 // + (2*5^(1/2)-14)/8
x = (2*5^(1/2)-14)/8
x in { (-2*5^(1/2)-14)/8, (2*5^(1/2)-14)/8 }
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