(16-8x-(7x^2)+(2x^3))/(x-4)

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Solution for (16-8x-(7x^2)+(2x^3))/(x-4) equation:


D( x )

x-4 = 0

x-4 = 0

x-4 = 0

x-4 = 0 // + 4

x = 4

x in (-oo:4) U (4:+oo)

(2*x^3-(7*x^2)-(8*x)+16)/(x-4) = 0

(2*x^3-7*x^2-8*x+16)/(x-4) = 0

2*x^3-7*x^2-8*x+16 = 0

2*x^3-7*x^2-8*x+16 = 0

{ 1, -1, 2, -2, 4, -4, 8, -8, 16, -16 }

1

x = 1

2*x^3-7*x^2-8*x+16 = 3

1

-1

x = -1

2*x^3-7*x^2-8*x+16 = 15

-1

2

x = 2

2*x^3-7*x^2-8*x+16 = -12

2

-2

x = -2

2*x^3-7*x^2-8*x+16 = -12

-2

4

x = 4

2*x^3-7*x^2-8*x+16 = 0

4

x-4

2*x^2+x-4

2*x^3-7*x^2-8*x+16

x-4

8*x^2-2*x^3

x^2-8*x+16

4*x-x^2

16-4*x

4*x-16

0

2*x^2+x-4 = 0

DELTA = 1^2-(-4*2*4)

DELTA = 33

DELTA > 0

x = (33^(1/2)-1)/(2*2) or x = (-33^(1/2)-1)/(2*2)

x = (33^(1/2)-1)/4 or x = (-(33^(1/2)+1))/4

x in { (-(33^(1/2)+1))/4, (33^(1/2)-1)/4, 4}

(x+(33^(1/2)+1)/4)*(x-((33^(1/2)-1)/4))*(x-4) = 0

(x+(33^(1/2)+1)/4)*(x-((33^(1/2)-1)/4)) = 0

( x+(33^(1/2)+1)/4 )

x+(33^(1/2)+1)/4 = 0 // - (33^(1/2)+1)/4

x = -((33^(1/2)+1)/4)

( x-((33^(1/2)-1)/4) )

x-((33^(1/2)-1)/4) = 0 // + (33^(1/2)-1)/4

x = (33^(1/2)-1)/4

x in { -((33^(1/2)+1)/4), (33^(1/2)-1)/4 }

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