f(2n)=3x^2+6

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Solution for f(2n)=3x^2+6 equation: 


Simplifying
f(2n) = 3x2 + 6

Remove parenthesis around (2n)
f * 2n = 3x2 + 6

Reorder the terms for easier multiplication:
2f * n = 3x2 + 6

Multiply f * n
2fn = 3x2 + 6

Reorder the terms:
2fn = 6 + 3x2

Solving
2fn = 6 + 3x2

Solving for variable 'f'.

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

Divide each side by '2n'.
f = 3n-1 + 1.5n-1x2

Simplifying
f = 3n-1 + 1.5n-1x2

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