(x^3-2x^2-68x-35)/(x+7)

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Solution for (x^3-2x^2-68x-35)/(x+7) equation:


D( x )

x+7 = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

x in (-oo:-7) U (-7:+oo)

(x^3-(2*x^2)-(68*x)-35)/(x+7) = 0

(x^3-2*x^2-68*x-35)/(x+7) = 0

x^3-2*x^2-68*x-35 = 0

x^3-2*x^2-68*x-35 = 0

{ 1, -1, 5, -5, 7, -7, 35, -35 }

1

x = 1

x^3-2*x^2-68*x-35 = -104

1

-1

x = -1

x^3-2*x^2-68*x-35 = 30

-1

5

x = 5

x^3-2*x^2-68*x-35 = -300

5

-5

x = -5

x^3-2*x^2-68*x-35 = 130

-5

7

x = 7

x^3-2*x^2-68*x-35 = -266

7

-7

x = -7

x^3-2*x^2-68*x-35 = 0

-7

x+7

x^2-9*x-5

x^3-2*x^2-68*x-35

x+7

-x^3-7*x^2

-9*x^2-68*x-35

9*x^2+63*x

-5*x-35

5*x+35

0

x^2-9*x-5 = 0

DELTA = (-9)^2-(-5*1*4)

DELTA = 101

DELTA > 0

x = (101^(1/2)+9)/(1*2) or x = (9-101^(1/2))/(1*2)

x = (101^(1/2)+9)/2 or x = (9-101^(1/2))/2

x in { (9-101^(1/2))/2, (101^(1/2)+9)/2, -7}

(x-((9-101^(1/2))/2))*(x-((101^(1/2)+9)/2))*(x+7) = 0

(x-((9-101^(1/2))/2))*(x-((101^(1/2)+9)/2)) = 0

( x-((101^(1/2)+9)/2) )

x-((101^(1/2)+9)/2) = 0 // + (101^(1/2)+9)/2

x = (101^(1/2)+9)/2

( x-((9-101^(1/2))/2) )

x-((9-101^(1/2))/2) = 0 // + (9-101^(1/2))/2

x = (9-101^(1/2))/2

x in { (101^(1/2)+9)/2, (9-101^(1/2))/2 }

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