f(x)=-2x^2-20-40

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Solution for f(x)=-2x^2-20-40 equation: 


Simplifying
f(x) = -2x2 + -20 + -40

Multiply f * x
fx = -2x2 + -20 + -40

Reorder the terms:
fx = -20 + -40 + -2x2

Combine like terms: -20 + -40 = -60
fx = -60 + -2x2

Solving
fx = -60 + -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 = -60x-1 + -2x

Simplifying
f = -60x-1 + -2x

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