f(x)=4x^3+8x

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Solution for f(x)=4x^3+8x equation: 


Simplifying
f(x) = 4x3 + 8x

Multiply f * x
fx = 4x3 + 8x

Reorder the terms:
fx = 8x + 4x3

Solving
fx = 8x + 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 = 8 + 4x2

Simplifying
f = 8 + 4x2

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