f(x)=5x(x^2-2x-1)

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Solution for f(x)=5x(x^2-2x-1) equation: 


Simplifying
f(x) = 5x(x2 + -2x + -1)

Multiply f * x
fx = 5x(x2 + -2x + -1)

Reorder the terms:
fx = 5x(-1 + -2x + x2)
fx = (-1 * 5x + -2x * 5x + x2 * 5x)
fx = (-5x + -10x2 + 5x3)

Solving
fx = -5x + -10x2 + 5x3

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -5 + -10x + 5x2

Simplifying
f = -5 + -10x + 5x2

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