f(x)=-x^3-3x^2+9x

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Solution for f(x)=-x^3-3x^2+9x equation: 


Simplifying
f(x) = -1x3 + -3x2 + 9x

Multiply f * x
fx = -1x3 + -3x2 + 9x

Reorder the terms:
fx = 9x + -3x2 + -1x3

Solving
fx = 9x + -3x2 + -1x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 9 + -3x + -1x2

Simplifying
f = 9 + -3x + -1x2

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