f(x)=x^3-kx^2+2kx-k-1

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Solution for f(x)=x^3-kx^2+2kx-k-1 equation: 


Simplifying
f(x) = x3 + -1kx2 + 2kx + -1k + -1

Multiply f * x
fx = x3 + -1kx2 + 2kx + -1k + -1

Reorder the terms:
fx = -1 + -1k + 2kx + -1kx2 + x3

Solving
fx = -1 + -1k + 2kx + -1kx2 + x3

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = -1x-1 + -1kx-1 + 2k + -1kx + x2

Simplifying
f = -1x-1 + -1kx-1 + 2k + -1kx + x2

Reorder the terms:
f = 2k + -1kx-1 + -1kx + -1x-1 + x2

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