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D( x )
x^2-(9*x)+14 = 0
x^2+3*x-4 = 0
x^2-(9*x)+14 = 0
x^2-(9*x)+14 = 0
x^2-9*x+14 = 0
x^2-9*x+14 = 0
DELTA = (-9)^2-(1*4*14)
DELTA = 25
DELTA > 0
x = (25^(1/2)+9)/(1*2) or x = (9-25^(1/2))/(1*2)
x = 7 or x = 2
x^2+3*x-4 = 0
x^2+3*x-4 = 0
x^2+3*x-4 = 0
DELTA = 3^2-(-4*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)-3)/(1*2) or x = (-25^(1/2)-3)/(1*2)
x = 1 or x = -4
x in (-oo:-4) U (-4:1) U (1:2) U (2:7) U (7:+oo)
(((x^2-8+7)/(x^2+3*x-4))*(x^2+3*x-10))/(x^2-(9*x)+14) = 0
(((x^2-8+7)/(x^2+3*x-4))*(x^2+3*x-10))/(x^2-9*x+14) = 0
((x^2-1)*(x^2+3*x-10))/((x^2+3*x-4)*(x^2-9*x+14)) = 0
x^2+3*x-4 = 0
x^2+3*x-4 = 0
DELTA = 3^2-(-4*1*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)-3)/(1*2) or x = (-25^(1/2)-3)/(1*2)
x = 1 or x = -4
(x+4)*(x-1) = 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^2-9*x+14 = 0
x^2-9*x+14 = 0
DELTA = (-9)^2-(1*4*14)
DELTA = 25
DELTA > 0
x = (25^(1/2)+9)/(1*2) or x = (9-25^(1/2))/(1*2)
x = 7 or x = 2
(x-2)*(x-7) = 0
((x^2-1)*(x+5)*(x-2))/((x+4)*(x-1)*(x-2)*(x-7)) = 0
( x+5 )
x+5 = 0 // - 5
x = -5
( x-2 )
x-2 = 0 // + 2
x = 2
( x^2-1 )
1*x^2 = 1 // : 1
x^2 = 1
x^2 = 1 // ^ 1/2
abs(x) = 1
x = 1 or x = -1
x in { 2}
x in { 1}
x in { -5, -1 }
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