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(1/10)*x^3-((15/2)*x)-25 = 0
(1/10)*x^3+(-15/2)*x-25 = 0
(1/10)*x^3+(-15/2)*x-25 = 0
(1/10)*x^3+(-15/2)*x-25 = 0 // * 0
{ 1, -1, 2, -2, 5, -5, 10, -10, 25, -25, 50, -50, 125, -125, 250, -250 }
1
x = 1
x^3-75*x-250 = -324
1
-1
x = -1
x^3-75*x-250 = -176
-1
2
x = 2
x^3-75*x-250 = -392
2
-2
x = -2
x^3-75*x-250 = -108
-2
5
x = 5
x^3-75*x-250 = -500
5
-5
x = -5
x^3-75*x-250 = 0
-5
x+5
x^2-5*x-50
x^3-75*x-250
x+5
-x^3-5*x^2
-5*x^2-75*x-250
5*x^2+25*x
-50*x-250
50*x+250
0
x^2-5*x-50 = 0
DELTA = (-5)^2-(-50*1*4)
DELTA = 225
DELTA > 0
x = (225^(1/2)+5)/(1*2) or x = (5-225^(1/2))/(1*2)
x = 10 or x = -5
x in { -5, 10, -5}
x in { -5, 10, -5 }
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