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D( x )
x^2+3*x-10 = 0
x+5 = 0
x^2+3*x-10 = 0
x^2+3*x-10 = 0
x^2+3*x-10 = 0
DELTA = 3^2-(-10*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-3)/(1*2) or x = (-49^(1/2)-3)/(1*2)
x = 2 or x = -5
x+5 = 0
x+5 = 0
x+5 = 0 // - 5
x = -5
x in (-oo:-5) U (-5:2) U (2:+oo)
(x+3)/(x+5)+6/(x^2+3*x-10) = 0
x^2+3*x-10 = 0
x^2+3*x-10 = 0
x^2+3*x-10 = 0
DELTA = 3^2-(-10*1*4)
DELTA = 49
DELTA > 0
x = (49^(1/2)-3)/(1*2) or x = (-49^(1/2)-3)/(1*2)
x = 2 or x = -5
(x+5)*(x-2) = 0
(x+3)/(x+5)+6/((x+5)*(x-2)) = 0
(x+3)/(x+5)+6/(x+5) = 0
x+3+6 = 0
x+9 = 0
(x+9)/(x+5) = 0
(x+9)/(x+5) = 0 // * x+5
x+9 = 0
x+9 = 0 // - 9
x = -9
x = -9
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