f(x)=4x^4-15x^3+5x^2+15x-9

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Solution for f(x)=4x^4-15x^3+5x^2+15x-9 equation: 


Simplifying
f(x) = 4x4 + -15x3 + 5x2 + 15x + -9

Multiply f * x
fx = 4x4 + -15x3 + 5x2 + 15x + -9

Reorder the terms:
fx = -9 + 15x + 5x2 + -15x3 + 4x4

Solving
fx = -9 + 15x + 5x2 + -15x3 + 4x4

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -9x-1 + 15 + 5x + -15x2 + 4x3

Simplifying
f = -9x-1 + 15 + 5x + -15x2 + 4x3

Reorder the terms:
f = 15 + -9x-1 + 5x + -15x2 + 4x3

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