f(3)=x^2+2x+15

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Solution for f(3)=x^2+2x+15 equation: 


Simplifying
f(3) = x2 + 2x + 15

Reorder the terms for easier multiplication:
3f = x2 + 2x + 15

Reorder the terms:
3f = 15 + 2x + x2

Solving
3f = 15 + 2x + x2

Solving for variable 'f'.

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

Divide each side by '3'.
f = 5 + 0.6666666667x + 0.3333333333x2

Simplifying
f = 5 + 0.6666666667x + 0.3333333333x2

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