(x^3-9x^2+27x-28)/(x-3)

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Solution for (x^3-9x^2+27x-28)/(x-3) equation:


D( x )

x-3 = 0

x-3 = 0

x-3 = 0

x-3 = 0 // + 3

x = 3

x in (-oo:3) U (3:+oo)

(x^3-(9*x^2)+27*x-28)/(x-3) = 0

(x^3-9*x^2+27*x-28)/(x-3) = 0

x^3-9*x^2+27*x-28 = 0

x^3-9*x^2+27*x-28 = 0

{ 1, -1, 2, -2, 4, -4, 7, -7, 14, -14, 28, -28 }

1

x = 1

x^3-9*x^2+27*x-28 = -9

1

-1

x = -1

x^3-9*x^2+27*x-28 = -65

-1

2

x = 2

x^3-9*x^2+27*x-28 = -2

2

-2

x = -2

x^3-9*x^2+27*x-28 = -126

-2

4

x = 4

x^3-9*x^2+27*x-28 = 0

4

x-4

x^2-5*x+7

x^3-9*x^2+27*x-28

x-4

4*x^2-x^3

27*x-5*x^2-28

5*x^2-20*x

7*x-28

28-7*x

0

x^2-5*x+7 = 0

DELTA = (-5)^2-(1*4*7)

DELTA = -3

DELTA < 0

x in { 4}

x-4 = 0

(x-4)/(x-3) = 0

x-4 = 0 // + 4

x = 4

x = 4

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