f(x)=x^4+4x^2

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


Simplifying
f(x) = x4 + 4x2

Multiply f * x
fx = x4 + 4x2

Reorder the terms:
fx = 4x2 + x4

Solving
fx = 4x2 + x4

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 + x3

Simplifying
f = 4x + x3

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