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D( x )
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 in (-oo:-5) U (-5:2) U (2:+oo)
(4-(6*x))/(x^2+3*x-10) = -2 // + 2
(4-(6*x))/(x^2+3*x-10)+2 = 0
(4-6*x)/(x^2+3*x-10)+2 = 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
(4-6*x)/((x+5)*(x-2))+2 = 0
(4-6*x)/((x+5)*(x-2))+(2*(x+5)*(x-2))/((x+5)*(x-2)) = 0
2*(x+5)*(x-2)-6*x+4 = 0
2*x^2-16 = 0
(2*x^2-16)/((x+5)*(x-2)) = 0
(2*x^2-16)/((x+5)*(x-2)) = 0 // * (x+5)*(x-2)
2*x^2-16 = 0
2*x^2 = 16 // : 2
x^2 = 8
x^2 = 8 // ^ 1/2
abs(x) = 2*2^(1/2)
x = 2*2^(1/2) or x = -(2*2^(1/2))
x in { 2*2^(1/2), -(2*2^(1/2)) }
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