f(2a)=3n^2+7n

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Solution for f(2a)=3n^2+7n equation: 


Simplifying
f(2a) = 3n2 + 7n

Remove parenthesis around (2a)
f * 2a = 3n2 + 7n

Reorder the terms for easier multiplication:
2f * a = 3n2 + 7n

Multiply f * a
2af = 3n2 + 7n

Reorder the terms:
2af = 7n + 3n2

Solving
2af = 7n + 3n2

Solving for variable 'a'.

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

Divide each side by '2f'.
a = 3.5f-1n + 1.5f-1n2

Simplifying
a = 3.5f-1n + 1.5f-1n2

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