(x-4)(x-4)/x^2-3x-15

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Solution for (x-4)(x-4)/x^2-3x-15 equation:


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

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

((x-4)*(x-4))/(x^2)-(3*x)-15 = 0

((x-4)*(x-4))/(x^2)-3*x-15 = 0

((x-4)^2)/(x^2)-3*x-15 = 0

((x-4)^2)/(x^2)+(-3*x*x^2)/(x^2)+(-15*x^2)/(x^2) = 0

(x-4)^2-3*x*x^2-15*x^2 = 0

x^2-3*x^3-15*x^2-8*x+16 = 0

16-3*x^3-14*x^2-8*x = 0

16-3*x^3-14*x^2-8*x = 0

16-3*x^3-14*x^2-8*x = 0

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

1

x = 1

16-3*x^3-14*x^2-8*x = -9

1

-1

x = -1

16-3*x^3-14*x^2-8*x = 13

-1

2

x = 2

16-3*x^3-14*x^2-8*x = -80

2

-2

x = -2

16-3*x^3-14*x^2-8*x = 0

-2

x+2

8-3*x^2-8*x

16-3*x^3-14*x^2-8*x

x+2

3*x^3+6*x^2

16-8*x^2-8*x

8*x^2+16*x

8*x+16

-8*x-16

0

8-3*x^2-8*x = 0

DELTA = (-8)^2-(-3*4*8)

DELTA = 160

DELTA > 0

x = (160^(1/2)+8)/(-3*2) or x = (8-160^(1/2))/(-3*2)

x = (4*10^(1/2)+8)/(-6) or x = (8-4*10^(1/2))/(-6)

x in { (4*10^(1/2)+8)/(-6), (8-4*10^(1/2))/(-6), -2}

(x-((4*10^(1/2)+8)/(-6)))*(x-((8-4*10^(1/2))/(-6)))*(x+2) = 0

((x-((4*10^(1/2)+8)/(-6)))*(x-((8-4*10^(1/2))/(-6)))*(x+2))/(x^2) = 0

((x-((4*10^(1/2)+8)/(-6)))*(x-((8-4*10^(1/2))/(-6)))*(x+2))/(x^2) = 0 // * x^2

(x-((4*10^(1/2)+8)/(-6)))*(x-((8-4*10^(1/2))/(-6)))*(x+2) = 0

( x+2 )

x+2 = 0 // - 2

x = -2

( x-((4*10^(1/2)+8)/(-6)) )

x-((4*10^(1/2)+8)/(-6)) = 0 // + (4*10^(1/2)+8)/(-6)

x = (4*10^(1/2)+8)/(-6)

( x-((8-4*10^(1/2))/(-6)) )

x-((8-4*10^(1/2))/(-6)) = 0 // + (8-4*10^(1/2))/(-6)

x = (8-4*10^(1/2))/(-6)

x in { -2, (4*10^(1/2)+8)/(-6), (8-4*10^(1/2))/(-6) }

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