f(4)=-x^2+8x+3

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Solution for f(4)=-x^2+8x+3 equation: 


Simplifying
f(4) = -1x2 + 8x + 3

Reorder the terms for easier multiplication:
4f = -1x2 + 8x + 3

Reorder the terms:
4f = 3 + 8x + -1x2

Solving
4f = 3 + 8x + -1x2

Solving for variable 'f'.

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

Divide each side by '4'.
f = 0.75 + 2x + -0.25x2

Simplifying
f = 0.75 + 2x + -0.25x2

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