f(5)=3x+x^2

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Solution for f(5)=3x+x^2 equation: 


Simplifying
f(5) = 3x + x2

Reorder the terms for easier multiplication:
5f = 3x + x2

Solving
5f = 3x + x2

Solving for variable 'f'.

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

Divide each side by '5'.
f = 0.6x + 0.2x2

Simplifying
f = 0.6x + 0.2x2

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