f(x)=-2x^2+5x+40

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Solution for f(x)=-2x^2+5x+40 equation: 


Simplifying
f(x) = -2x2 + 5x + 40

Multiply f * x
fx = -2x2 + 5x + 40

Reorder the terms:
fx = 40 + 5x + -2x2

Solving
fx = 40 + 5x + -2x2

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 40x-1 + 5 + -2x

Simplifying
f = 40x-1 + 5 + -2x

Reorder the terms:
f = 5 + 40x-1 + -2x

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