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D( y )
y = 0
y^2 = 0
y = 0
y = 0
y^2 = 0
y^2 = 0
1*y^2 = 0 // : 1
y^2 = 0
y = 0
y in (-oo:0) U (0:+oo)
y/(y^2)-(5*y)-(7/y)-24-3 = 0
y/(y^2)-5*y-7*y^-1-24-3 = 0
-5*y^1-6*y^-1-27*y^0 = 0
(-5*y^2-27*y^1-6*y^0)/(y^1) = 0 // * y^2
y^1*(-5*y^2-27*y^1-6*y^0) = 0
y^1
-5*y^2-27*y-6 = 0
-5*y^2-27*y-6 = 0
DELTA = (-27)^2-(-6*(-5)*4)
DELTA = 609
DELTA > 0
y = (609^(1/2)+27)/(-5*2) or y = (27-609^(1/2))/(-5*2)
y = (609^(1/2)+27)/(-10) or y = (27-609^(1/2))/(-10)
y in { (609^(1/2)+27)/(-10), (27-609^(1/2))/(-10)}
y in { (609^(1/2)+27)/(-10), (27-609^(1/2))/(-10) }
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