f(2)=x^2+2x-1

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Solution for f(2)=x^2+2x-1 equation: 


Simplifying
f(2) = x2 + 2x + -1

Reorder the terms for easier multiplication:
2f = x2 + 2x + -1

Reorder the terms:
2f = -1 + 2x + x2

Solving
2f = -1 + 2x + x2

Solving for variable 'f'.

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

Divide each side by '2'.
f = -0.5 + x + 0.5x2

Simplifying
f = -0.5 + x + 0.5x2

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