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

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


Simplifying
f(x) = 3x3 + -4x2

Multiply f * x
fx = 3x3 + -4x2

Reorder the terms:
fx = -4x2 + 3x3

Solving
fx = -4x2 + 3x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -4x + 3x2

Simplifying
f = -4x + 3x2

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