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D( x )
2*x+7 = 0
2*x+7 = 0
2*x+7 = 0
2*x+7 = 0 // - 7
2*x = -7 // : 2
x = -7/2
x in (-oo:-7/2) U (-7/2:+oo)
(33/(2*x+7))*(4*x-1)-12*x = 0
(33*(4*x-1))/(2*x+7)-12*x = 0
(33*(4*x-1))/(2*x+7)+(-12*x*(2*x+7))/(2*x+7) = 0
33*(4*x-1)-12*x*(2*x+7) = 0
48*x-24*x^2-33 = 0
48*x-24*x^2-33 = 0
3*(16*x-8*x^2-11) = 0
16*x-8*x^2-11 = 0
DELTA = 16^2-(-11*(-8)*4)
DELTA = -96
DELTA < 0
3 = 0
3/(2*x+7) = 0
3/(2*x+7) = 0 // * 2*x+7
3 = 0
x belongs to the empty set
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