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D( x )
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0
2*x+3 = 0 // - 3
2*x = -3 // : 2
x = -3/2
x in (-oo:-3/2) U (-3/2:+oo)
(8*x^2+6*x-13)/(2*x+3) = 0
8*x^2+6*x-13 = 0
8*x^2+6*x-13 = 0
DELTA = 6^2-(-13*4*8)
DELTA = 452
DELTA > 0
x = (452^(1/2)-6)/(2*8) or x = (-452^(1/2)-6)/(2*8)
x = (2*113^(1/2)-6)/16 or x = (-2*113^(1/2)-6)/16
(x-((-2*113^(1/2)-6)/16))*(x-((2*113^(1/2)-6)/16)) = 0
((x-((-2*113^(1/2)-6)/16))*(x-((2*113^(1/2)-6)/16)))/(2*x+3) = 0
( x-((-2*113^(1/2)-6)/16) )
x-((-2*113^(1/2)-6)/16) = 0 // + (-2*113^(1/2)-6)/16
x = (-2*113^(1/2)-6)/16
( x-((2*113^(1/2)-6)/16) )
x-((2*113^(1/2)-6)/16) = 0 // + (2*113^(1/2)-6)/16
x = (2*113^(1/2)-6)/16
x in { (-2*113^(1/2)-6)/16, (2*113^(1/2)-6)/16 }
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