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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
(4*x^2+7*x-3)/x+1 = 0
(4*x^2+7*x-3)/x+(1*x)/x = 0
4*x^2+7*x+1*x-3 = 0
4*x^2+8*x-3 = 0
4*x^2+8*x-3 = 0
4*x^2+8*x-3 = 0
DELTA = 8^2-(-3*4*4)
DELTA = 112
DELTA > 0
x = (112^(1/2)-8)/(2*4) or x = (-112^(1/2)-8)/(2*4)
x = (4*7^(1/2)-8)/8 or x = (-4*7^(1/2)-8)/8
(x-((-4*7^(1/2)-8)/8))*(x-((4*7^(1/2)-8)/8)) = 0
((x-((-4*7^(1/2)-8)/8))*(x-((4*7^(1/2)-8)/8)))/x = 0
((x-((-4*7^(1/2)-8)/8))*(x-((4*7^(1/2)-8)/8)))/x = 0 // * x
(x-((-4*7^(1/2)-8)/8))*(x-((4*7^(1/2)-8)/8)) = 0
( x-((-4*7^(1/2)-8)/8) )
x-((-4*7^(1/2)-8)/8) = 0 // + (-4*7^(1/2)-8)/8
x = (-4*7^(1/2)-8)/8
( x-((4*7^(1/2)-8)/8) )
x-((4*7^(1/2)-8)/8) = 0 // + (4*7^(1/2)-8)/8
x = (4*7^(1/2)-8)/8
x in { (-4*7^(1/2)-8)/8, (4*7^(1/2)-8)/8 }
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