3x^2-10x+7/x+4

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Solution for 3x^2-10x+7/x+4 equation:


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

3*x^2-(10*x)+7/x+4 = 0

3*x^2-10*x+7/x+4 = 0

3*x^2-10*x^1+7*x^-1+4*x^0 = 0

(3*x^3-10*x^2+4*x^1+7*x^0)/(x^1) = 0 // * x^2

x^1*(3*x^3-10*x^2+4*x^1+7*x^0) = 0

x^1

3*x^3-10*x^2+4*x+7 = 0

{ 1, -1, 7, -7 }

1

x = 1

3*x^3-10*x^2+4*x+7 = 4

1

-1

x = -1

3*x^3-10*x^2+4*x+7 = -10

-1

7

x = 7

3*x^3-10*x^2+4*x+7 = 574

7

-7

x = -7

3*x^3-10*x^2+4*x+7 = -1540

-7

{ 1/3, -1/3, -1/3, 1/3, 7/3, -7/3, -7/3, 7/3 }

1/3

x

1/3

3*x^3-10*x^2+4*x+7 = 7.33333333

1/3

-1/3

x

-1/3

3*x^3-10*x^2+4*x+7 = 4.44444445

-1/3

-1/3

x

-1/3

3*x^3-10*x^2+4*x+7 = 4.44444445

-1/3

1/3

x

1/3

3*x^3-10*x^2+4*x+7 = 7.33333333

1/3

7/3

x

7/3

3*x^3-10*x^2+4*x+7 = 0

7/3

x-7/3

3*x^2-3*x-3

3*x^3-10*x^2+4*x+7

x-7/3

7*x^2-3*x^3

4*x-3*x^2+7

3*x^2-7*x

7-3*x

3*x-7

0

3*x^2-3*x-3 = 0

DELTA = (-3)^2-(-3*3*4)

DELTA = 45

DELTA > 0

x = (45^(1/2)+3)/(2*3) or x = (3-45^(1/2))/(2*3)

x = (3*5^(1/2)+3)/6 or x = (3-3*5^(1/2))/6

x in { (3-3*5^(1/2))/6, (3*5^(1/2)+3)/6, 7/3}

x in { (3-3*5^(1/2))/6, (3*5^(1/2)+3)/6, 7/3 }

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