f(x)=x(x^3-4x^2-20x+48)

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Solution for f(x)=x(x^3-4x^2-20x+48) equation: 


Simplifying
f(x) = x(x3 + -4x2 + -20x + 48)

Multiply f * x
fx = x(x3 + -4x2 + -20x + 48)

Reorder the terms:
fx = x(48 + -20x + -4x2 + x3)
fx = (48 * x + -20x * x + -4x2 * x + x3 * x)
fx = (48x + -20x2 + -4x3 + x4)

Solving
fx = 48x + -20x2 + -4x3 + x4

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 48 + -20x + -4x2 + x3

Simplifying
f = 48 + -20x + -4x2 + x3

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