f(x)=(-x^2)+(1.8x)+(2.5)

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Solution for f(x)=(-x^2)+(1.8x)+(2.5) equation: 


Simplifying
f(x) = (-1x2) + (1.8x) + (2.5)

Multiply f * x
fx = (-1x2) + (1.8x) + (2.5)
fx = (-1x2) + (1.8x) + 2.5

Reorder the terms:
fx = 2.5 + (1.8x) + (-1x2)

Solving
fx = 2.5 + (1.8x) + (-1x2)

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 2.5x-1 + 1.8 + (-1x)

Simplifying
f = 2.5x-1 + 1.8 + (-1x)

Reorder the terms:
f = 1.8 + 2.5x-1 + (-1x)

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