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D( x )
x^2-64 = 0
x+8 = 0
x-8 = 0
x^2-64 = 0
x^2-64 = 0
1*x^2 = 64 // : 1
x^2 = 64
x^2 = 64 // ^ 1/2
abs(x) = 8
x = 8 or x = -8
x+8 = 0
x+8 = 0
x+8 = 0 // - 8
x = -8
x-8 = 0
x-8 = 0
x-8 = 0 // + 8
x = 8
x in (-oo:-8) U (-8:8) U (8:+oo)
(10*x)/(x^2-64)-(8/(x-8)) = 1/(x+8) // - 1/(x+8)
(10*x)/(x^2-64)-(8/(x-8))-(1/(x+8)) = 0
(10*x)/(x^2-64)-8*(x-8)^-1-(x+8)^-1 = 0
(10*x)/(x^2-64)-8/(x-8)-1/(x+8) = 0
(10*x*(x-8)*(x+8))/((x^2-64)*(x-8)*(x+8))+(-8*(x^2-64)*(x+8))/((x^2-64)*(x-8)*(x+8))+(-1*(x^2-64)*(x-8))/((x^2-64)*(x-8)*(x+8)) = 0
10*x*(x-8)*(x+8)-8*(x^2-64)*(x+8)-1*(x^2-64)*(x-8) = 0
2*x^3-x^3-64*x^2+8*x^2-128*x+64*x-512+4096 = 0
x^3-56*x^2-64*x+3584 = 0
x^3-56*x^2-64*x+3584 = 0
x^3-56*x^2-64*x+3584 = 0
{ 1, -1, 2, -2, 4, -4, 7, -7, 8, -8, 14, -14, 16, -16, 28, -28, 32, -32, 56, -56, 64, -64, 112, -112, 128, -128, 224, -224, 256, -256, 448, -448, 512, -512, 896, -896, 1792, -1792, 3584, -3584 }
1
x = 1
x^3-56*x^2-64*x+3584 = 3465
1
-1
x = -1
x^3-56*x^2-64*x+3584 = 3591
-1
2
x = 2
x^3-56*x^2-64*x+3584 = 3240
2
-2
x = -2
x^3-56*x^2-64*x+3584 = 3480
-2
4
x = 4
x^3-56*x^2-64*x+3584 = 2496
4
-4
x = -4
x^3-56*x^2-64*x+3584 = 2880
-4
7
x = 7
x^3-56*x^2-64*x+3584 = 735
7
-7
x = -7
x^3-56*x^2-64*x+3584 = 945
-7
8
x = 8
x^3-56*x^2-64*x+3584 = 0
8
x-8
x^2-48*x-448
x^3-56*x^2-64*x+3584
x-8
8*x^2-x^3
3584-48*x^2-64*x
48*x^2-384*x
3584-448*x
448*x-3584
0
x^2-48*x-448 = 0
DELTA = (-48)^2-(-448*1*4)
DELTA = 4096
DELTA > 0
x = (4096^(1/2)+48)/(1*2) or x = (48-4096^(1/2))/(1*2)
x = 56 or x = -8
x in { -8, 56, 8}
(x+8)*(x-56)*(x-8) = 0
((x+8)*(x-56)*(x-8))/((x^2-64)*(x-8)*(x+8)) = 0
((x+8)*(x-56)*(x-8))/((x^2-64)*(x-8)*(x+8)) = 0 // * (x^2-64)*(x-8)*(x+8)
(x+8)*(x-56)*(x-8) = 0
( x+8 )
x+8 = 0 // - 8
x = -8
( x-56 )
x-56 = 0 // + 56
x = 56
( x-8 )
x-8 = 0 // + 8
x = 8
x in { -8}
x in { 8}
x = 56
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