f(x)=4x^3-5x^2-4x+5

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Solution for f(x)=4x^3-5x^2-4x+5 equation: 


Simplifying
f(x) = 4x3 + -5x2 + -4x + 5

Multiply f * x
fx = 4x3 + -5x2 + -4x + 5

Reorder the terms:
fx = 5 + -4x + -5x2 + 4x3

Solving
fx = 5 + -4x + -5x2 + 4x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 5x-1 + -4 + -5x + 4x2

Simplifying
f = 5x-1 + -4 + -5x + 4x2

Reorder the terms:
f = -4 + 5x-1 + -5x + 4x2

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