f(x)=-2x^3-4x^2+30x

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Solution for f(x)=-2x^3-4x^2+30x equation: 


Simplifying
f(x) = -2x3 + -4x2 + 30x

Multiply f * x
fx = -2x3 + -4x2 + 30x

Reorder the terms:
fx = 30x + -4x2 + -2x3

Solving
fx = 30x + -4x2 + -2x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 30 + -4x + -2x2

Simplifying
f = 30 + -4x + -2x2

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