f(4)=2x^2-x+9

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Solution for f(4)=2x^2-x+9 equation: 


Simplifying
f(4) = 2x2 + -1x + 9

Reorder the terms for easier multiplication:
4f = 2x2 + -1x + 9

Reorder the terms:
4f = 9 + -1x + 2x2

Solving
4f = 9 + -1x + 2x2

Solving for variable 'f'.

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

Divide each side by '4'.
f = 2.25 + -0.25x + 0.5x2

Simplifying
f = 2.25 + -0.25x + 0.5x2

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